You and the member have been dating for a little over a year. You were getting some hate from negative fans and staff about your relationship so you started second guessing wether or not you were a good enough boyfriend/girlfriend. You suggest breaking up with them to make things "easier" and this is how they would react!
"W-what? I don't understand? What happened?!"
He would be so heartbroken. He would also be so worried that it was because of something he may have done. He would try talking to you and getting you to tell him why you would think this way. In the end he would tell you how much he loves you and give you all the reasons why breaking up wouldn't be a good idea. He isn't the type of person to force people to do anything, so if you were 100% settled on ending it then he would let it happen, but it would hurt him so much.
He would be a little mad at first. He would make you both sit down and talk for hours or however long it takes until you change your mind. Not only did it hurt him that you even thought about that, but it hurt him because he thought things were going so well and it felt like you just wanted to throw it all away. Once you explained about the hate and the way you were feeling and he saw you crying he wouldn't feel angry anymore. He would simply wrap you in a hug and tell you that your love can handle anything and he would never let others hurt you or this relationship.