You are so right, shotgun. I have been reading some of the other threads and I am absolutely stunned by the similarities. They are certainly different in the details, but the similarities between them are all so striking.
At the moment I am wondering if I have it in me to deal with this for another I don't know how long.
I guess I've been dealing with this gradual disintegration in my H's behaviour for so long now (5 years) that I think that another couple of years isn't much time really. But then I'm so worn down by it all, and my self esteem is so low, that I think it might be best to just walk away - for my own sake. And then I think that a difficult time is also an opportunity for tremendous self growth.