I think your problem lies in thinking you NEED a man at all!
Your fear of being single is keeping you trapped in an abusive relationship.
Quite honestly with that attitude/belief even if you did manage to leave this abusive relationship you would be incredibly vulnerable to falling into another.
You need to leave this relationship (I think you know this) but you also need to be single for a good while and get some good therapy to address this false and unhealthy belief.
Regarding manipulating you into going back to him - do you have dc together? Cos if not then just cut him completely off!
Don't give him your new address, block him on phone/email/sm even get new accounts if necessary. Have nothing more to do with him
Even if you do have dc together ONLY deal with him regarding dc - the second he starts on about anything else cut him off.
I've been single 18 years, to all intents and purposes. I've dated but not met anyone worth settling down with. I wasn't leaving an abusive relationship my ex cheated but I recognised I needed some breathing space first so I didn't date for a couple years after split.
There is absolutely nothing wrong with being single and its miles better than being in an abusive relationship.
My parents relationship was abusive and she was miserable and she's wasted her life staying with him - don't be her