Am i ust messed up or is this really hapening?

somtimes when i see this girl in my cl in school.. get erflys i ussually talk to her.but i get all shy.do i like her in that way..or am i actually in to girls...(btw im a girl my self) because it happends if i see any oher girl and shes really pretty..i dont know..wats going on =[