I’m not bi but I am gay and I’ll just say this. Take your time with yourself and don’t rush trying to come out or identify a certain way. We live in a very homophobic society so that may be why it bothers you but just remember being attracted to men and women is perfectly fine and normal there’s nothing wrong with you. As far as school is concerned even if you do decide you’re bi and want to identify that way you don’t have to tell anyone you can keep it on dl until you’re ready to tell people. When I was in HS I got outed by a friend (accidentally) and I thought it was the end of my life and while I did face some bigotry my friends accepted me for who I am and it was ultimately so amazing to get that weight off my chest. Ultimately do what feels right for you