If you're a pussy do what she does, go out and try to get wild maybe find a rebound girl to fuck, get drunk and eat lots of chocolate.
If you're a man, go on with your life and do what will make you better as a person, use the anger for motivation to find a better girl, form a better life and build a better future. Nothing will beat that especially when she comes running back. Less headache for you if she doesn't, a win win situation.
P.S. Don't forget to wipe your vagina if you go with the first option