Oh christ. Thats fuggin awful!! First off, dont kick his ass. Not worth the legal trouble. Second, obviously this is gonna suck to be you for a little bit here but it WILL recede faster than you currently believe. In a situation like this theres no question you are better off without her and will be happier for it sooner than later.
My advice, get married to the gym immediately, and enjoy watching MYEC rise to glory. Youll immediately feel better about getting healthier and youll have some huge ass motivation while your there. Women have sent meoff on athletic binges like no other lol, its how eventually ended up on p90x. But the combo of money and being ripped 6-12 months from now and what your feeling now will be a distant memory.
At the risk of coming across sexist or enjoying of rap....ill take it back right after I post it:
"bitches aint shit but hos and tricks"
For your ex that applies. Dont let her convince you of anything different. Heres to the unknown, and the next, best, chapter of your life!
MYEC