I am going to read up on the links people have suggested to help me process and understand this situation i am in
Please don't be tempted to intellectualise what is going on while you are still in the thick of it. It will only hold you physically back from making the important move that you must make. Do this when you are safely at your mother's house.
The only preparation you need to move out and away is the effort it takes to pack and to accomplish the journey.
There is nothing to be gained by understanding or seeking to process information while you are still in this situation, and much to lose because it can get in the way of taking the action that you must take.
Please accept what everyone here is telling you - it is abuse and no appeal to his better nature or to reason will stop it. He knows what he is doing. He is dong it on purpose. He needs to hurt people. That is what he uses relationships for and he will never stop.
You didn't cause it.
You can't control it.
You can't cure it.
The only person you can change here, the only person you have any control over here, is you.
When you are safely away from him you can start analysing his behaviour and you can decide whether he is a narcissist or a sociopath or what type of abuser in Lundy Bancroft's descriptions he is.
None of that is relevant now. You can get to it later and it will be a great help to you as you begin the detoxification process that can only happen when you have put distance between you and him.
What matters now is what you are, which is a woman in danger of being destroyed in every way a human being can be destroyed.