what should i do?

Boys are hard to detect especially when they like a certain girl or not. Try to engage into new hobbies to keep your mind busy. Don't let him feel that you're into him because he might interpret it badly. You can know something about him secretly but never invade his privacy. Or you'll end up like a stalker. Just befriend him and don't get too close. They say leaving something behind may get someone curious. We don't know he might be curious to you by doing that. Enjoying being in love but don't let that feeling intervene your other interests.