Thanks all. I am not stupid or naive or self deluded, I know the risks and the general mumsnetters views. He is saying the right things - not the classic things but answering all my questions, suggesting counselling, explaining how / why it happened but not excusing himself. The odd time he has fallen into blaming the state of the marriage I have pulled him up on it and he takes it on board.
He has said in a conversation he that he does not want to stay married if nothing changes as we were both unhappy and would rather split now but wants to give it one mo go at trying to get the magic back etc etc.
So my decision is wether to give us that chance - not wether we stay married. The process would be to see what went wrong and why, what do we both want, and the outcome could be we stay together or either of could decide no that's it. I feel And want to give myself the chance to explore things.
The affair is definetly over (I'm not saying that means he could never be unfaithful but this OW is over.). We are dealing with OW harassing him and me together, he agrees I have the right to check any phone / email / device when ever I want.
Actually sod it, I'm not going to continue to justify my current thinking!
I just wanted to know if anyone had any positive outcomes or useful info for me. Thank you jones, what you say connects with my thinking.
I guess it's a risk I feel at the moment I am willing to take. it's going to be a hard, brace journey for both of us. I have to forgive him, find some level of trust, sort out my own issues - I haven't had sex with him for 8 years as I have some funny block in my head about it all, I have turned myself into being his mother - much of it for my own gain. He has to learn to be a kinder person, take part in family life, sort his head out regarding his dysfunctional childhood, learn who he is and what he wants rather than surround himself by strong people and go along with it silently unhappy.
Maybe it's possible, maybe it's not but I feel what we had and could have is worth the work.