Re: Getting over him...
I don't care that he's a completely different person now, it doesn't matter to me....
I have to mention that it's a lot easier to love someone at a distance than to be with them every day. I wonder if, had you been with him daily through this "phase," you'd still feel the same way about him.
I think it's easy to idealize someone who is not present, and it's a natural human tendency. If you were with him, you probably would care a LOT that he's a different person now....and a much less desirable person at that.
Charms is right, having friends and being involved with your new life will help. But the fact is, you will keep idealizing him until you WANT to stop.
You WILL survive this time, unless a safe falls on your head or whatever....the question is whether you really WANT to just survive or to have a real life based on what is happening now. The person you loved may not exist any more, and believe me, you will not be able to change him back into that person you loved, no matter what you do.
It might help to talk to a counselor about your feelings. Usually colleges have free or close-to-free ones.
Best of luck to you!