Steve Rogers
His thoughts about you: Steve always acts the same when meeting new people and you were no different, he greeted you with a firm handshake and a huge smile but on the inside he was a wreck of thoughts. Each one trying to come out and not sound ridiculously stupid and embarrass himself in front of you and each one became more helplessly romantic and sweet. He loved you before he had even had a chance to learn your name, you reminded him of Peggy in a way but his thoughts of her vanished when you spoke and all that was left for him was you. His first thoughts went something like this; "oh, she's pretty and has a firm handshake but I bet she has a boyfriend. Oh wait I haven't even said anything, I bet I look really dumb right now and just blew any chance of talking to her again. Great job, Steve. Wait, is she really talking to me still? She has a cute smile and her hair is-" and it goes on and on, trust me.
Your thoughts about him: Being a professional Shield agent for a long time meeting with new people was something you did almost daily but when you met Steve it just felt different. You thought mostly it was due to his silence but intense staring but you couldn't get how adorably sweet he looked. He was a gentlemen, had a sweet smile and it was all you could do to not hug him because of it. You knew him from a stack of papers perspective so knowing him as a person was much different and, much more interesting. You couldn't believe how, in two minutes of meeting this man you already had a hopeless crush on him but a part of you liked that. You never could have imagined how close you two would become or how happy the two of you would be.
Tony Stark
His thoughts about you: Tony was cocky, in all sense of the word he thought he was the greatest thing on earth. He never needed anyone and always relied on himself to get things done so when you came along it was a literal smack in the face, mostly due to his careless flirting. He had never wanted someone so badly, never needed someone next to him so much before. His work was interrupted by the time he was spending trying to talk to you, the first day was the absolute worse for him because you hardly glanced his way. He had no idea he would fall for anyone like he had for you and he really didn't know why he enjoyed the feeling so much when it was so foreign to him.
Your thoughts about him: You admitted to yourself you thought Tony was cute but that was about all you thought about him because of his terrible jokes and horrific attempts at flirting with you. You really wanted to get to know him, well you did but you told yourself you didn't to keep yourself away from him. You knew all about him, he was rich and famous and the last thing you needed in your life was a man like him. That was until you actually started talking to him, understanding where he came from and then you realized there was so much more to this than what you knew. You had fallen in love with him through your daily talks unaware of what was to come but happy to follow where ever it was going to lead.
Bruce Banner
His thoughts about you: Bruce was a mental mess when he met you, you were a proud and outgoing professor and he was. . .not any of that. He spent all of his time hidden, fearing that he would lose control and hurt someone or worse he would hurt you. He didn't know what had happened in the few moments of meeting you he was already afraid to hurt you, he wanted to be next to you and hated seeing Tony there in his place. He watched your smile, the way your eyes lit up when you did and how you were so confident about everything you did made him forget about the other guy. You were already his remedy and he hadn't even managed to catch your name in the conversation or maybe it was because he was too busy studying you to hear anything but his own thoughts. He loved you without even realizing it.
Your thoughts about him: Bruce, to you, was adorable in every way from how he worked to how he looked you were smitten and sure that he was already taken. When Tony had told you he was single and a few other things he shouldn't have said when introducing someone but it kind of made you happy. You loved listening to him talk about science in a way that was more of a cute way of rambling when he wasn't sure what he should say. You smiled when he nervously shook your hand, if you hadn't known about the Harlem incident you wouldn't believe this sweet man had caused it. You had never fallen in love with anyone as quickly as you had this man, he was already becoming the best thing in your life.
Thor Odinson
His thoughts about you: He had grown up with you so he had known you for a very long time now but when he first realized his feelings it was though he had just met you. He always watched you work with his mother and talk with his father, he knew that you were special to them and now you were something special to him. You were his world and he had just realized how much you mean to him, how your soft smile made his smile and the way you held his hand to reassure him. He was watching you like a love sick puppy, watching you like he had just remembered who you were and how much he loves you.
Your thoughts about him: You remembered meeting him as a child, he was such a loud and fun person to be around and now seeing him as a man you saw him differently. You watched him grow, watched him almost transform into this man before you even knew it was happening and before you even had a chance to protect your heart you were gone. You loved how hard he worked, loved him through his exile and you love him even now. His baby blue eyes, the way his smile would turn into a mischievous grin that always meant trouble for the both of you as kids, everything about him had suddenly turned into everything you love. You had no chance but you wouldn't have it any other way.
Loki Laufeyson
His thoughts about you: Annoyingly talkative, harsh, cold, the list goes on and on for him because he was not in any mood to make friends and yet you talked to him as though you were one. You were always talking to him even if he didn't want you to do so, you did it anyways. He never understood why until the day he saw you crying, the moment he saw that strong women he loathed turn into the soft women before him. He had never felt so much pain for someone else, he really didn't like it but he couldn't change it and it was killing him that he wasn't able to really comfort you properly. His previous thoughts on you changed, the way he watched you from his cell changed and when he was finally able to leave that cell the way he spent his time changed. Somehow in that time his heart had been stolen and the way he felt changed, he fell in love with you.
Your thoughts about him: Misunderstood, wrongly done, and so much more explained the man you were instructed to watch but none of it changed your thoughts on him. You had just met him and if you had never read his information or been warned by Thor to be careful around him you wouldn't have known how bad this man could be. You always saw the condescending way he looked at you but you never thought any differently because your heart was telling you he needed this, he needed your help somehow. You never could imagine how right you were, how much you meant to him but you knew he meant the world to you and that was enough for now.
Clint Barton
His thoughts about you: Strong, from the moment he laid eyes on you he saw how strong your heart was. He saw your sadness and how hard you tried to hide it with a sweet smile, a smile he had really taken a liking too. He didn't know why he wanted to spend all of his time with you, why he wanted to know everything about you or even why he was trying so hard to get your attention but here he was telling you about himself and trying to get you talking. You were suddenly the most important person in his life and he was damn sure going to make sure you were alright and you were happy.
Your thoughts about him: You were safe around him, even meeting him for the first time all you felt when around him was security and it made you genuinely happy. You loved his conversation, the way he seemed so into the topic, and how he moved his hands around when he talked. You had fallen for the archer rather quickly despite having only known him a short while. You were very happy with him and always felt the need to comfort him whenever you felt like he was even slightly upset. Why things like this happened you didn't know but you never questioned it and only left it up to fate.
James "Bucky" Barnes
His thoughts about you: When he first met you it was back in the forties and he was a different man and how he saw you then and how he saw you when he met you again those seventy years later did not change. You were still beautiful, still incredibly smart and even in trouble incredibly funny. You were his world before he even knew what he wanted and before he could remember who he was or who you were. Every time he thought about his first meetings with you all he thought of was how much he cared about you, how much your happiness meant to him and how unique you were. He remembered how sad your eyes looked when he couldn't remember your name but how much you clearly loved him despite this. He loves you even after all that time he never stopped, he may have temporarily forgotten but the feelings never left.
Your thoughts about him: He was adorable when you first met him, funny and flirty and everything you could ask for but when he disappeared and forgot everything you felt your heart break. You hadn't even realized how much you loved him until he was gone and you couldn't be with him again. When you found him by the lakeside he was different but in his eyes was everything you saw when you met him back then, everything you needed just hidden in confusion. You were there for him even if he didn't want you to be for a while, his slight smiles and occasional chuckles made your heart flutter just like back then, just like when you first met. It may have been hard for those years he was gone but you had never thanked fate more than the moment you met him again.