Pennytree, I really feel for you. This time last year I could have written your OP. Ex H & I hardly had sex in 8 years and last year I almost had an affair with a friend (I would have gone through with it but he didn't want to get involved!)
For the last 6 months of our marraige I had to almost switch off my feelings towards H, it was the only way I could cope with the constant rejection and feelings of being ugly/worthless/less than a person....
Anyway, in January I told him I wanted us to seperate and although this year has been one of the toughest emotionally, financially etc, I am glad I finally bit the bullet and made the choice to end things. Now at least, I am trying to live on my own terms and am not trying to fit in with anyone else's wishes.
You sound utterly confused. Would you consider some time away from the OM just to give yourself the emotional space to deal with the situation with your H? You need a clear head in order to make choices.
When exH and I decided to seperate I went through the feelings of guilt and questioning myself too, I think because we had reached a decision a lot of the tension was gone and for a while we got on really well as friends. It made me wonder if I was doing the right thing. I just kept telling myself that we were the same people and that nothing had changed.
Incidentally, ExH has since had counselling and discovered that he has a pattern of emotionally distancing himself from partners once he falls in love with them due to his mum leaving the family when he was little.
A sorry, I've rambled on a lot. Don't know if it helps! I still feel like a reject, I have had a couple of casual partners since ending the marraige but at the back of my mind I feel like they will stop wanting me too. I'm in no way ready for another relationship till I can sort out my own feelings of self worth (or lack thereof!)
Hope you are ok....