Ten points for most helpful answer?? Please help!!!!!!!!!?

We broke up like 4 days ago we weren't datin long but we talked and flirted went back and forth for 3 months..I think he is actually over me, or he is hurt and found someone else. I don't know what I'll do when I see him tomorrow at school..should I say hi to be friendly..I broke up with him because he was actin distant and i told him I still liked him and he said he kinda still liked me..hes basically showing all these signs that he's over me because he knows how I feel and if he wants me back he'd tell me but he hasn't so should I avoid him?? I'm afraid it'll be very awkward when I see him. I want to tell him off and prove him wrong but I'm not feeling all that confident since I still like him and he has moved on so what should I do?