Don't quite know, where you are from, but where I am, being behind on child support, can land a person in jail.

You don't know how to get out physically, or is it emotionally? Most times, I find, leaving an abuser behind is tough on the victim, because victims tend to take pity on their abuser. ((that's usually what gets victims into these messes, in the first place.))

You are not legally bound to him. Do you know how to change your locks?
That would be my first piece of advice. Have you ever contacted a hotline, to learn how to make a safety plan. Once these abusers, turn physical, it's destined to remain that way.

Thing is, they strike once. Then it stops, then it could be months or within the year, but it happens again. It's usually, within the year, not longer.

He can't hold a job, has you paying all the bills, and he's still flirty with the ex wife and obviously displaying stalker mentality. That's a dangerous situation to be in.

Is he, really, what you want?! Is this, really what you want?

Time, to start taking back your life. You can internet search and find videos on how to change a lock, if you don't know how. Gosh, I could teach you, with one hand behind my back...had to do, that once.