I think you held yourself together with class and dignity-great job!
And remember, time is on your side. Just because he says he's going to file for D doesn't mean that he will. Afterall, it's been 4 months and he hasn't filed.
Can you take a trip somewhere that you've never been to right now? Go with your girlfriend or your kids or both, and don't tell your H where you are going. Have fun! Get out of the house for a few days.
The next time he contacts you after you get back from your mysterious getaway, tell him you are thinking about putting your house on the market. When he asks why, just tell him you've been thinking about everything and leave it at that. You will ignite curiosity in him. And he may ask you if you would be interested in moving to the mountains with him.
Hang in there!
Me 40 WAH 43 T 4 years M 9 1/2 months stepson 9 H moved out 3 weeks ago No D filed