Communication is the key to getting along in a marriage. It's tougher if you can't get someone else to set the ground rules and teach both of you how to communicate, but you are going to have to have a talk with this man.
He is moving back into the home, which I assume belongs to both of you. But it has been your space for a long time, and he needs to try to understand that at a gut level he is taking over what you have felt was your space. He needs to be considerate of you while doing that and fitting back into the home.
That said, everyone needs to be on their best behavior. You both need to treat each other AT LEAST AS WELL as you would treat a stranger. That is, you should both say thank you to each other, you should try to be considerate of each other and you should both avoid cursing and displaying short tempers, etc.
When my husband and I were reconciling I imagined that we were dating. When he came home each evening I treated him not like my husband, but like a date. I offered him a drink, I had an appetizer ready, the house was cleaner than usual, I was dressed sexy with makeup on, and I was cooking one of my gourmet meals (not the stuff the kids like). And in response, he acted like a date too. He didn't go into the bedroom and watch tv for the entire evening. He stayed in the kitchen while I cooked and talked to me! (My husband is not a talker.) And because he had also been taught by Retrouvaille to be considerate, he rinsed a few plates and put them in the dishwasher. It didn't make any significant difference in the amount of cleaning I had to do, but it showed that he has making an effort -- even a tiny one. And it was the EFFORT that made a difference to me.
We all are too comfortable around our family members and feel free to display the worst side of our personalities. Unfortunately, that is one of the things that ruins a marriage. You need to work on getting him to understand that it takes more than good intentions to get along, it takes positive actions too.
