One other important thought I forgot to mention...
When we have briefly separated in the past, H has been the one to leave. And he has said and done whatever it took during that time to "show" me he was committed to changing in order to come home. Then once home it all went away.
I kind of think that when he lives elsewhere (read less comfortable environment) he is motivated to do things differently largely bc he wants to get back in the door and have access to things like tv, food, etc...
With him in the house, anything he chooses to do is bc he wants to do it-- not bc he is trying to weasel his way back in the front door.
That was a part of my decision to be the one to leave....