Help need advice please!

My fiancé and I live together and if we get in an argument.. Like today ... He says he don't deserve to argue.. That he had to deal with it enough in his past relationships with his exes ... Him and I RARELY argue or don't get along... I got mad for him comparing me to them ... He completely avoids the situation and me and sits in the living room while I'm in the bedroom and completely ignores me and acts like he did nothing wrong and I'm in the wrong ...he never apologies for things he says... What should I do?