Hey There Stressed Out ~ There is a word or two for this kind of guilt producing behavior; emotional blackmail comes to mind. You are not responsible if he makes poor choices. Don't let him blame you with his threats or any other bad behavior. He is an adult I assume. You are not responsible!
Perhaps you need to ask yourself what is preventing you from making a decision.

If you are asking for opinions, like, 'what would you do?' I would have to say in all honesty, cut the cord. Don't let yourself get dragged into his lies.
Change the locks on your house, file for divorce, which will include a restraining order, and move on from this person with very poor impulse control.
I think; You deserve better than this man is capable of giving you. So sorry.