Never Judge a Book by its Movie
I had this problem a while ago, in a book i read and from what someone told me and from what i have witness in my parents 48 yr marriage. It takes 2 to argue. You must make a consicous effort to not argue back. Let it go and pick your battles. He cannot argue by himself. For me that was hard because i would never let my fiance get the last word esspecially when i knew i was right. SO i excercised this. He comes to me one day fed up with our bank, and is rilled up and says why did you have to choose this bank, you couldve gone to.. etc etc. Now in my head im saying.. "you fool, we already have an acount at the 'etc' bank we went to this bank for the interest rate, and you were there when we opened the account, if you had a problem with it then you should have said something" Now had i said that out loud, he would have a lame comeback and it would turn into an arguement.
SO.. i stopped took a breath and said, "yea i kno, sorry" and walked away. I think i even heard the question mark form in his head. He was prepared for an argument and definately not expecting that. It saved us both hours of argument and going to bed mad. I think he has began to take on this meathod because there are times when i say im going to break off a piece of my mind to him, and he answers me in that sort of agreeing, apologetic manner and justs asks me what i want to happen. The part of me wants to argue, but i have no reason to, and no one to argue with since he has chosen not to. We have come very far from how we used to be. This really works.
Everytime you feel an argument comming whether he is starting it or you are.. Just take a mental step back, take a breath, and remember you have the power to pick your battles. Is it worth it? You do not lose by choosing not to argue, it will be the best decision you make. (But dont back down all the time, some arguing is healthy)
All the best of luck!