He sounds like he wants to keep you as his “Plan B”. Funny how they don’t want us but get so upset at the idea that we might move on and find somebody new.
I’m glad that you will be in a financial position to buy a home of your own. If the kids are ok with moving, then I would take that approach. H can buy you out of your share if he doesn’t want to sell the house - HE could rent HIS house out while he’s working away.
You confronting him with the reality of what divorce means is interfering with his fantasy world where he gets to have his cake and eat it too.