guy i like may be gay??

So there's this boy I like, a lot. I've had feelings for him since 5th grade. We both listen to the same music and do things at the exact same time (like pointing at one another at the same time). Sometimes in class, our knees will touch and we'll leave them there. I told my best friend about my crush and she says she thinks he's gay or bi because he has a lot of friends who are girls. I'm so lost..Should I just forget the crush or go for it?