Do you think I'm lesbian? Really confused..? ?

I've never fancied a guy properly before. When I was about 4 I did 'supposedly' fancy this guy but he moved. And all the way through primary school I used to kiss this kid, as a joke. But he was a slobbery and I hated it hahah. It's only since I turned about 14 (I'm 15 now) when I've thought I might be lesbian. I don't actually fancy any girls, but i think some celebs are really pretty and sometimes wish I was them.. (hayley Williams, kristen Stewart.) but i know when I guy is good looking but I don't wanna go out with them or anything. Like, I can think, that guys got nice hair or something. My friends see a guy and say stuff like 'ooft he's fit.' and I'd just be like.. 'he's handsome but I don't like him in that way.' but i don't feel that way about girls either... I'm really confused. I'm 15 btw.