Thank you all, your musings have been very useful. They give me ideas on what to think about.
AF - there is a punisher aspect to me, though I try to rein it in. The shock of being away for 2 days after discovery, though short was very sharp for him. He stayed with a friend for 1 night but I told him that he shouldn't be, so he went to a hostel. I think it did him good to be totally by himself and miserable. I was happy to hear that he was sad and missed us all. TBH (and I am being honest) I was glad to think if me, at home in the warm with the children and him in a grotty hostel, considering what he had done.
With regard to the pitiful dog eyes - that does not work with me. I am not, nor have I ever been a sentimental person. The "poor me, I've ruined my life routine" makes me roll my eyes. Maybe that's harsh but that's me. I'm not unable to empathise, I'm just choosy about who gets such treatment. He doesn't qualify at the moment. Self pity is off my radar.
mathanxiety you have asked about my rush. I don't feel in a rush, but this is how I do things. I dislike drawn out pondering. I like to do all reasearch, think fully and make an informed decision. But I don't like to wait around. I know that might not add up with my emotions at the moment and I am trying to force myself to not make a decision. But it is hard.
I don't think I can go to counselling with him. I don't want to go, and I don't want to give him what he wants (for me to go). I will look into finding someone that suits me, and he can see someone. Maybe down the line it's something that we can reconsider.
He has booked a counselling session with someone local. She uses PCT (Rogerian)...does anyone know anything about this? BArmy what sort of counselling did you have and what did it do for you? What sort of issues were you sorting through?
I don't think that I can ask him to leave again. I feel, for me, that things are more likely to get resolved if he is here. And not in a "resuming the satus quo" way, because there is no way in hell that I am rolling over. Also, DS is much better since he returned. He is so sensitive and has been fractious while he was away. He burst into tears in the middle of Sainsbos the other day and wants to sleep with the door open and a million lights on 
If I look at myself honestly, I think that I will try again. I am far from ready to tell him this. I don't want him to think that I am giving in. But when I really think about it, the alternative is less appealing that giving it a shot. I feel that if it doesn't work, it's ok - I can do things by myself, I can survive. I will live without him easily enough, but maybe it will be worth it. Maybe it won't and in a month or so I might decide that it isn't worth it and he can go. We shall see.
I might change my mind tomorrow though.
hoochie thanks for popping on and reading this behemoth of a thread. You know you should be writing that fic! I NEED to read it!
He turned up today while I was waiting for DS in the school playground. So he must have left work early.
foghorn yes - I think you are right, it would do noth of us some good. Since he has returned he has done a years worth of housework (for him) so maybe we should see if that can stretch to a whole weekend when faced with 2 children?
Where shall I go. I hate spas.