Yeah...you are in the toughest position you could be in. He can't break off total contact. That will be a huge mountain to climb and one he will constantly be climbing.
When he starts fights, say you'll talk about it later when you are both calm and leave. You will only lose ground fighting. Leave him alone a lot...it will also give him time to prove himself to you and show you he really is going to do this. Most of what he is going to deal with is inside him. There is nothing you can do but stay calm, and when you can't, leave asap.
