I think I'm hi, but I'm not sure.?

Well, I believe at such a young age, it is natural to feel uncertain about your sexual orientation. It's still in the process of evolving, so it's not a problem if bạn don't know what do bạn identify yourself with. There's no need to rush, these things usually work themselves out. But if bạn do find both boys AND girls equally attractive, then yeah, then I'd say bạn do have bisexual tendencies indeed. But I'm not an expert, this is just my own personal opinion. Hope it was helpful, at least a bit.