There's a lot of good advice in the movie, "Forgetting Sarah Marshall"
Especially the doctor's advice.
And Kunu's advice
The combo of these two things definitely helped me with the initial funk of my past breakup. The final cure was simply allowing time
to help heal and move on.
Oh... and don't call or text her from now on (especially stay away from drunk texting and calling), and don't reply to her if she calls or texts you. Delete her number if you don't think you have the will power. And unfriend her immediately from facebook (it's agonizing to see daily updates from an ex). There is nothing worse than having a good day of moving on, only to log into facebook and see her at a bar with a douche bag's arms around her - which results in: sending you right back to square 1, feeling like shit, getting pissed, hitting the booze, and drunk texting. Trust me, if you haven't already done so, unfriend her now. facebook may be a cool new social network thing, but it has created psychological nightmares for ex-lovers. Good luck!