Thanks for all the messages. Have been trying to keep it about me because that is where the issue lies, ultimately. Also, because explaining it all may take some time.
Given where this thread is going, I will say a bit more. I'm sorry if my postings have sounded overly cautious but I am very aware that this is a public forum. I am generally a private person and I also feel quite stupid that I have allowed the situation to continue for as long as I have without coming to any decision.
My DH made a stupid mistake a long time ago but, from my POV, made a much bigger one in keeping it secret. I have massive issues with secrecy which he knew about at the time but I also understand why he said nothing (it's what many, many people would do in the same situation, and there is another thread on this topic where many people advocate the same thing).
Our relationship had been in trouble before I found out (he had been gradually withdrawing emotionally) but since I found out a lot of the problems between us began to make sense. We went to Relate to work on these issues but it didn't really change anything for me. In many ways the counselling has made things more difficult because it has made me recognise the degree to which he has withdrawn.
I believe that he is having enormous difficulty coming to terms with what he did and the impact it has had. He is now on ADs and seeing a counsellor on his own. He appears to be working through things but when I reflect on how things are nothing seems to have changed. It feels as if he 'gets stuff' just as I reach the end of my patience.
Prior to the stupid mistake we had an incredible relationship based on enormous mutual trust, respect and openness, where no topic was off limits. It was very important to me having come from a family which did not value these things. I knew something changed but failed to get anywhere talking to DH about it and put it down to the arrival of children.
Day to day we get on well, we are friends etc. We parent well together and agree on lots of things. We have common interests. He is generally kind and is working on his aversion to housework! But something is missing. I want what we had back. I need to know that I am important to him, that I am valued and loved. And I don't.
If it was just us, I would have taken off and done my own thing until I had clarity about what to do in relation to us. But I don't have that luxury. I feel so angry and hurt and upset about what has happened but also his response.
I have enormous issues around divorce as my parents separated when I was small. Quite frankly, they could have written the book on how not to do it. And Dittany, you are absolutely right. I had to divide myself up in lots of ways. I guess what I hadn't recognised was that it's a coping strategy for a situation that I feel powerless in.
And I do feel powerless. My DH says all the right things but this doesn't seem to be reflected in his behaviour. Or is, but only when push comes to shove. Any decision will have to be mine and mine alone as he will not engage. Any discussions about us are either good, engaged but nothing changes or he turns into someone I simply don't recognise who blames me for everything which alienates me further.
I am scared of being on my own with the children as I am aware of my own failings and the ways in which I am like my mother. Also I feel very angry about the situation and am concerned that I will be trying to support distressed children while I am grieving myself.
And of course the children are aware of what is going on and it's breaking my heart. But it also breaks my heart to think of separating them from their father.