Dealing with my partner

Now, you are probably asking "why would I only move out of the bedroom and not out of the house?" however, I felt like I had no choice. He was NOT going to move out again especially since this was our second time together, and I couldn't afford to move out on my own. Sure, I made good money, but I had 2 kids to still support, and since we had gotten a divorce back several years ago, he was still obligated to pay child support and I knew that this was not enough to live on, even with my jobs. This was tough as I had to see him daily and at first he thought it was a joke. He would see me and smile really big and tell me hi, and this made matters worse. What do you do with a partner who doesn't acknowledge there's a problem?