Is this just a stage, or is something really wrong?

I am just lost right now. I'm a 14 year old girl, so hopefully this is just a phase. I'm not saying I have anything against gays, but Its just not something I want to go through. I find it very easy to attract guys. But I never really find myself being attracted to them. There is one specific girl that I've always really liked. It turned out she had a crush on me, and stuff happened. And It never felt wrong or awkward or anything, it felt right. But I knew that it was wrong and that girls are obviously not supposed to be attracted to girls, so I stopped seeing her and I just never spoke to her again. I felt really bad about it, and I chose to do the appropriate thing (or at least the normal thing). I started dating a guy. I just gave it a shot because I thought he was good looking, and because he is a nice guy. He is 15, and we ot along great and everything. But when it came down to getting physical, it just felt awkward for me and not right. I was just doing something I didn't want to do, and I tried for about 3 months but I was tiered of pretending. I just don't feel that way about boys. I mean, I am not physically attracted to them. And I do try not to think about girls in "that" way, but I can't. Is this just a stage?