I gotta agree on this. Constantly referring back to the, "if I get married" serves no purpose other than to stir the pot. The truth of it is, you want your space, privacy, and freedom. That's not dependent on a new marriage, or the old one. So, it's time to get that topic out of the discussions.
You want your space. You'd prefer it be in your house. You want to figure out what it takes for him to give you that. And you already know he's mostly talk, so fine. Let him head to court if he wants to go down that road. He's NOT going to like a court ordered settlement any more than he likes your ideas, because the judge doesn't care what he wants. The judge cares what the law says is fair and equitable.