I think some form of counseling would be good for both of you. It gives you both a 3rd party to talk to, a mediator to get you all talking and get to the root of the problem.

If counseling is out of the question, google how to deal with stubborn people, it gives you some ideas. Not sure what will or won't work, but it may be worth a try.

It's confusing that he all of a sudden decided to treat you this way. Has he experienced something traumatic in the last few months? Maybe a death of a loved one, gotten demoted at work or lost his job. Something happen out of his control that upset him. Sounds to me like he is trying to gain control of something and you happen to be the easiest target.