I feel your pain, as i am dealing with a break up myself from a 9 year friendship, 6 year relationship.

I find what helps me:
1. Talk to your friends if you have any left. Someone willing to give you value into your situation.
2. Positive affirmations during the day – try “Louise Hay Meditation” on youtube. YOU ARE WORTHY!
3. When the going gets tough, harness that pain and anxiety and unleash the F*****G FURY at the gym until you almost drop dead!
4. Find salvation in books, self help books, and positive messages.

Take some time off and LET IN the anger and frustration rather than putting it off, then go to the gym.
Some people will say keep yourself busy, but i find what helps me is to face it now rather than letting it hit you like a ton of bricks. You “keep yourself busy” is a form of masking the symptoms like taking a pill, but we all know thats not the answer.
My best friend called me brave for not taking the pill and becoming a hopeless zombie like him. He said if he could do it all over again, he would rise from the darkness.
THERE IS ONLY ONE WAY TO GO WHEN YOU HIT ROCK BOTTOM. =D

Good luck!
Fight it, dont run from it like your chicken shit boyfriend that cant face his own parasites.
You are WORTHY!
Mastery of Love – Don Miguel Ruiz