Why is he so mean to me? What happened?

from what you said it seems like the guy is really popular. mayb all the popularity went to his head and now he's just some egotistic jerk? if that's the case i dont think you should involve yourself with him any longer, cuz you'll just end up hurt. i want to advise you to talk to him about your feelings first before you decide to give up on him or not, but i'm afraid he might use that to gossip to his friends about. honestly, i think you should think about all the points of this message before coming to a decision. i hope this helped and i hope everything turns out good.