Im Confused

I think I am falling in love with this boy but I’m pretty sure he is straight. I don’t want to mess up our relationship because we’re good friends but I just can’t stop thinking about him. We run track together, and if I make things awkward between us it’ll be 4 years of having to see him. (I’m a freshman) I don’t know any older gay people to talk to, all my friends are straight and there’s no way they can relate, so I came here for advice. What should I do? I feel very lonely.