Likewise. Let him go. It's tough when HIS parents are living with YOU! (You KNOW I don't get that, but that's just me) What kind of guy buys a house and lets his parents stay with his ex-wife? WHAT???
You really seem to be so level headed, and are always super-reflective. Close down the "he's coming back" stuff. I know it's hard. Detaching from his family is tough when his parents are constantly around you. Not to be harsh, but have they come up with any idea to "get a place of their own?" That would certainly give you more opportunity to detach.