A/N: This was the only version of the song I could find, that would work on here. It skips a paragraph. The song is called, Photograph, by Ed Sheeran.
You let out a shriek of pain and your body fell to the floor.
-Castiel's POV-
Castiel snapped out of it and his eyes stopped glowing. His wings were still out, feathers were going everywhere.
Your body was motionless on the floor, still bleeding out.
"Y/N!" Cas ran over and picked your lifeless body up.
He brushed your hair out of your face and kissed you on the forehead, expecting to see your beautiful smile grow. Nothing.
"I'm sorry," Castiel was crying holding your body, each teardrop hit your forehead.
"Hell, sorry won't even cut it!" Castiel wailed.
Dean ran down the hallway to see Castiel's wings out and him holding your body.
"Castiel?" Dean walked over and put his hand on your forehead, it was so cold.
"What happened?" Dean demanded.
"I..." Castiel couldn't tell Dean, he knew that Dean loved you too.
"You did this?!?!" Dean grabbed Castiel by the shirt.
Sam ran in and saw this, "Hey! Dean let Castiel go!"
Dean obeyed but stared at Castiel.
Sam looked and saw your body in Castiel's arms.
"Cas, what happened?" Sam was trying not to cry but he choked up.
"I...I did this," Castiel said quietly.
Sam just stared and couldn't say a word, if he did he would've burst in tears.
Tears were running down Dean's face, "Why?! Was she a demon or?"
"I lost control..." Castiel noticed his wings were still out but he didn't care.
"Yeah, we can obviously see that," Sam pointed to the wings and all of the ebony feathers on the floor.
Castiel kissed the top of your head and lifted up in his arms, bridal style. He carried you to the bed and lied you down. He closed your scared looking eyes.
Dean came up behind him and grabbed his shirt, making Cas spin around.
"You better have a good story," Dean's face was so close to Castiel's face their lips were almost touching.
Dean let go and held your lifeless hand, "I love you," He kissed your cheek.
Dean got up and walked out of the door.
Sam looked disappointed in Cas but walked over to you, "Oh, I'm so sorry Little One," He picked up a feather from the floor and stuck it in your hair and he kissed your forehead.
Sam didn't say anything but he sat on the bed with you.
"Sam, I-" Castiel started but Sam cut him off.
"What happened Cas?" Sam glared at him then back at your face.
"She went to the future and saw that Aleana is going to become a monster. She wanted to do something about her when she came back to the present. I freaked out and well..." Castiel looked at you with tears in his eyes.
"Castiel, do you think you can bring her back?" Sam looked a little bit hopeful.
"I don't think so, anyways she wouldn't want to see me or be with me," Cas looked down, trying to hide the tears going down his cheek.
"Maybe, maybe not. Castiel, I don't even know what to say!" Sam started to scold him, "You killed her, and you are going to be dead meat when Dean finds out what happened,"
"I know, just, she may come back," Castiel opened his locket you gave him, he smiled at the picture of you two.
"Couldn't you see her in heaven?" Sam brushed some hair out of your face.
"Well, depends if she said yes to the reaper," Cas looked a little worried, how if she didn't say yes?
"She did, I don't feel any cold spots," Sam looked confident that you were okay.
"We will wait and if she doesn't come back in a few days, I will look for her," Castiel insisted, trying to convince himself.
"Fine, just keep distance from Dean. I don't want to break up a fight," Sam said as he walked out of your room.
Castiel looked at you and saw a photograph that was in your pocket. He looked at it and it was another picture that you carried around, but it was different. It was a picture of the whole family, Dean, Sam, You, and Castiel. On the back of it was a song name: Photograph.
Castiel remembered the song, it was the song that Cas sang to you. Castiel stared at your face and caressed it singing the song softly:
Loving can hurt
Loving can hurt sometimes
But it's the only thing that I know
When it gets hard
You know it can get hard sometimes
It is the only thing that makes us feel alive
We keep this love in a photograph
We made these memories for ourselves
Where our eyes are never closing
Hearts are never broken
Times forever frozen still
So you can keep me
Inside the pocket
Of your ripped jeans
Holdin' me closer
'Til our eyes meet
You won't ever be alone
Wait for me to come home
Loving can heal
Loving can mend your soul
And it's the only thing that I know
I swear it will get easier
Remember that with every piece of ya
And it's the only thing we take with us when we die
We keep this love in this photograph
We made these memories for ourselves
Where our eyes are never closing
Our hearts were never broken
Times forever frozen still
So you can keep me
Inside the pocket
Of your ripped jeans
Holdin' me closer
'Til our eyes meet
You won't ever be alone
And if you hurt me
That's OK, baby, only words bleed
Inside these pages you just hold me
And I won't ever let you go
Wait for me to come home
Oh you can fit me
Inside the necklace you got when you were 16
Next to your heartbeat
Where I should be
Keep it deep within your soul
And if you hurt me
Well, that's OK, baby, only words bleed
Inside these pages you just hold me
And I won't ever let you go
When I'm away
I will remember how you kissed me
Under the lamppost
Back on 6th street
Hearing you whisper through the phone,
"Wait for me to come home."
Cas smiled, remembering your smiling face when he sang it to you.