Spooks - this is exactly what I was worried about! He's away with the fairies isn't he. Like Sykes this was exactly my experience. I think you've just got to let him get on with it. That decision, the final one IYKWIM, is definately the hardest but it doesn't seem like he's giving you an option does it?
FWIW I found that as soon as I had made my mind up and contacted the solicitor etc I really did start to feel much better - kind of getting on with the future instead of lingering in the past.
I did see a counsellor through all this which did help me to see that I had done all that I could before getting to that point. Do you think you would find that useful?
The counsellor also said something to me that no friend would have dared to which was along the lines of 'hundreds of relationships break up every week why do you think that yours would be any different - no its not fair but thats life'! It was shocking at the time but when I tried to answer the why should my marriage have been any different I realised that all the answers I was giving were solely from my viewpoint and would not have been shared with my ExH for some time. The we were so close, we had something that no-one else seemed to have, all our friends thought we were great together, he was my solemate blah blah. Well I thought that but given he had been having an affair with someone else for a considerable time he clearly didn't. And in the mudslinging immediately after it was clear that he didn;t even seem to like me much let alone love me. No one who loved me or even wanted me as a friend would have hurt me in the way that he did!!
The counselling really might help to separate out your feelings from his feelings and should reinforce the message that you can't make someone else love you - no matter how much you try.
The future will look better for you, I promise, once you have moved on...
Lots of hugs
Jxx