You are strong. You are very strong to confront him the way you did and stick to your guns. You are right. I think this is an addiction or a sickness of some sort. How he can deny it when you both know it's true is incredible.
I think it might help for you to talk to a marital counselor on your own, to see if you can find someone experienced with dealing with these porn situations. Perhaps someone can give you an idea of what kind of outcome is possible.
I'm sorry he is so lost. I think he was counting on his belief that you could not leave him. He said it more than once. You are very strong to stand up and say you will not put up with that.
