How to Know if Teenage Guy Likes me

Yo! So in school there's this guy I like. We're both in band/marching band and share two classes with each other. He doesn't really talk to me in one of the classes, but in the other class we sit close to each other, so we talk at least once almost daily. I can also swear that I've caught him looking at me a few times. Like, staring. But I don't know if I'm overanalyzing or if he actually likes me. AMA in the comments but don't be a creep please and thank you