My wife now seems to want to make it work and too keep the seperation to a minimal time (less than what the counsellor has suggested).
She certainly has had some form of breakdown & it won't be an easy fix.
I have no idea how people get through this (it is absolute madness) but for the past couple of weeks I have been feeling a lot better and that has helped.
We are far from out of the woods yet but thanks for your help - I'll keep you updated.