Ok here's the thing, everyone keeps saying its just puberty, and you should wait. And maybe thats true, but some people, if they feel strong enough about it, will be in denial of who they really are. Even I am not sure, I had this relationship (kinda) with this girl at my boarding school. It was complicated, but made me realize that I am bi/ possibly gay. I first realized it when I would only be turned on by girl interaction, not by guy interaction. I was petrified by the thought, I was thinking that it wasn't right, and that in society, I need to be straight. At first, I could never see myself with a girl, but with everyday coming and passing, its becoming even more clear. While i'm still not completely sure who I will end up with, I can still see myself with both. You say that really deep down you feel straight, but that may just be your denial. So just go with the feeling, find a girl to talk to. Don't go too fast, take it slow. And compare those feelings with that of a past relationship with guys. Hope you do well., and better than me.