no matter what, make sure your kids are safe and not made pawns between your break up.
Also, try arbitration rather than litigation, I did w/ my first and it was relatively painless except when she tried to come back after I was blissfully happy with mrs F (who is waaaay smarter than me nd I love to be around people who are smarter than me cause Im lazy )
Change your look.
Change your friends.
Change your outlook.
It's good to move out of state. It is liberating to be free of the influence of people who make you sad or whatever. It is still possible to build your new life to suit yourself, at whatever age. Just do it and never look back.