What do I do if he treats me like crap?

Like untitled393 said, texting, msn, email, myspace etc. But if you want to see his reaction when you tell him how you feel you can always sit near him or next to him then write a note or text on your phone and give the msg to him.

Well in a case like this, I rele can't stand when any guy treats a girl like crap, but try either texting him bout it, or myspace or something like that. That way you don't have to face him, and you don't have to deal with him being a complete jerk or anything

Your first sentence said it all. He treats you like crap! Based on that just stop thinking he's so great and stop dwelling on him. Once he sees you're ignoring him, if he really likes you he'll come across. If he doesn't, consider that good riddance. Just because he liked you in the past doesn't mean he still likes you. People's feelings change. No guy that likes a girl will treat her like crap! If he's the type of guy that goes from hot to cold towards you, why would you still want to pursue him. Isn't there anything better out there?