Her leaving right now is really shitty. You should take it as an indication that she does not love you, at all. She said, more or less, "It's not you, it's me..." But we all know what it means when a girl says that.
Take it a day at a time man. Relax. Everyone's been through a terrible breakup before. This shit will all work itself out. One of my good friend's had a terrible accident last year in the fall, couldn't take finals, was in a wheelchair for 6 months, etc. A year later, he's still working to fix all the stuff at school that got messed up, but he can walk now, has a new girlfriend, things are fine at school, etc. You've just got to hang in there. Whenever you're down you think you can't get any lower, and whenever your up things aren't as good as you thought they'd be, but life still moves through that cycle over and over again. You'll be back up again.
BROKEN HEARTS ARE FOR ASSHOLES.