Ok, I was in a similar awful situation last spring. Honestly there are a few things that will help. First, you should find out what you
said in the alleged drunk dial.
If getting back together is not a plausable option...
-Hang out with your girlfriends who tell you what a superior jerk he is... that always made me feel better.
-Make resolutions for yourself with guys (I will always let the guy pick up the check on the first date, I will never yell at him before calmly trying to explain, I will not justify a guy's actions that are less than dignified)
-Distract yourself with your sorority involvement, excercise, focus on school.
-Take all your negative energy from the break up and change it to positive energy to invest in yourself and your friends. Praise yourself and build yourself up. Your too strong to let this idiot bring you down.
-And if all else fails....shopping and a bottle of Cabernet with your girls will solve any problem.
If you want to get back together...
-Initially give him some space
-Then apologize for what you said in the drunk dial (if apologies are needed) and ask for a casual coffee session to just clarify stuff.
-Tell him that more than anything you want to salvage a friendship and whatnot.
-If that goes decently then start hanging out in the same scenes again and be pleasant towards him but down fawn
-Hopefully things will fall back into place!
Good luck. We have all been there!