Ghost, I think you need to get some space in your living arrangement. My H is still here and it is torture. He is leaving in 2 more weeks and not at all what I want but the closer I get to his "leave" date the more I realize that living with him, having to see him coming and going and glaring at me and sometimes interacting and sometimes not is absolutely chipping away at my soul.
I don't know your finances. Maybe rent your nice big house and use the money to rent two smaller places. Maybe sell. I don't know the logistics, but I think it is time to separate physically before you crash.