How do you know if he's trying to say 'I'm super shy' or 'I don't like you'?

Well it seems like this boy has feelings for you. Give him a chance. I can tell that this boy is shy, and even me. I'm shy and quiet around my crush. So just talk to him. If you like him, then you'd be the one to start a conversation. It took me a whole lot of nerve to ask out my crush, and even more to accept the fact that she doesn't like. Or at least not the way I like her. So ask him out. Ask him is he likes you. It'll make him really happy, I'm sure.