Sorry to hear this Pup, but I understand completely.
I know you've thought a ton about your sitch, but have you ever thought that to an "it's all about me" person, the reason they have trouble relating to a generally good, thoughtful, giving person is that they can never have empathy for that person and that's what makes an A so intoxicating to them? That there's another person EXACTLY like them?
And I agree with everyone else. In house separation wouldn't work for me and I suspect you either.
Take care.
Hope4us
Me - 49, W 49 S22 & S18 Dday 9/4/07 W claims NC 4/7/08 8/29/09 - Divorce Busted. Lots to work through, but we're going to make it.