What should I do?

I'd never keep anything a secret with my girl, even if I tried to keep our relationship a secret it would get out sooner or later so might as well make a choice.

Okay obviously this guy has some commitment problems. Personally I hate confronting people but in this case you should just come straight out with it. When he goes to give you a hug or says he likes you just be like "are you sure cause they way you act doesn't really show it" and if he really wants it to be kept a secret that bad then he's hiding something and he just isn't the one for you. If you really like him and think you should keep trying I suggest the simple route of jealousy, make him jealous so that he runs to your side.
Best of luck girl!

A person who's into you shouldn't want to keep you a secret and he's just not worth your attention. I know it's difficult and I wouldn't even want to go back and imagine what it's like at school anymore, but sounds like he's using you as a "comfort blanket" when he needs to.

Personally I'd suggest setting some boundaries and tell him that nothing is going to happen between the two of you until he can commit to it in public as well as in private. If he's really into you he'll understand. If he's just using you, then he'll walk away.

Your young and don't deserve to be messed about by some boy who's acting as if he's ashamed to be with you in public. You Deserve Better !!!! Good luck honey !