Hey there, Claire!
A lot of the time when a guy likes a girl he’s too shy to tell her, or to act like he likes her – his meanness can be a cover-up for how he really feels. I know, strange behaviour but that’s guy for you! Let him know you don’t like the way he’s treating you, and maybe bringing this up with him will give him the chance to tell you that he likes you! And if he continues to be mean to you, then he’s so not worth it and you’re better off without him!

Hope this helps!