Im in love with my best friend and I have no idea what to do.

This is one heck of a situation.Well first of all i think he is in denial . He may be afraid of what people may think. Maybe what his family may think. It might also be that he is just afraid of his feelings for you. Invite him out, have dinner have a coffee something and try to talk to him about it just don't be so pushy to know why..And whats he is feeling.