I feel your pain. The constant questioning of everything that happens. Wondering about the future, trying to figure out what we should do. All of these things drive us crazy and are so bad for us but humans are flawed and we can't control what our mind wants to do. If we had control over what we could and couldn't think about wouldn't this all be so much easier?
I never had to do in house separation my W left on the day I found out things were bad. You say you could live with it to insulate your kids from D but how much damage is living in a house with parents who barely talk going to do them?
I'm not tying to tell you to kick your W out or anything like that but I think in the same situation and if I had the balls I would start asking some serious questions about your R and why she is still around if she doesn't want to be.
Easy for me to say my W is gone and at the start I would have killed for her to stay and even in house separation but now, 7 months in and the way I see things now? Life is to short and if she doesn't love me and doesn't want to be with me I don't want her here. It is that simple.
Another very common theme I have seen on this forum in my time here is how many of us LBS are getting walked all over. It's not a coincidence, it's lost respect for us as men and I am going to do whatever it takes to be a real man again.
ME- 31 W-25 T-5 M-3 D2 ILYBNILWY and moved out - FEB16 W seeing someone else - JUL16