I don’t think I’m capable of love.

I have emotions like everyone else but for some reason when it comes to lovers I feel nothing. I had sex for the first time and after I felt nothing....no change, no closer to him, i didn’t lose apart of me. The only thing that’s changed is him, i can tell he cares for me more and more everyday and i just feel nothing for him. This is not the first boy I’ve met where i thought i liked them at first and then i lose interest or feelings die out......i think it might be something wrong with me because it seems like i really can’t care for someone else.