does he like me?

so im best friends with a guy ive known since last year (were freshmen). we were close last year, but we just got closer this year because we have more classes together. anyways, i don’t know how to tell if he likes me. he’s one of the more popular guys who dates a bunch of girls, and im a very conservative girl who has never had a boyfriend. but today he told me to make him a friendship bracelet and told me to sit next to him in the auditorium tomorrow at school. we talk everyday and have 3 classes together. on my birthday he sent me a really sweet birthday message, but i feel like it’s just him being nice especially because he talks about his girl problems to me. any advice on how to tell if he like me?