I agree. Acceptance of what you are going through is very important.
One thing I would like to say, however, is that I would like to see you have another focus besides withdrawal. When we met up in Paris I noticed that all you wanted to talk about was withdrawal. I would have liked to have expanded and talked about other things. I know it's hard when you are retired and live alone but I think it would be good if you had something else. Something to take your mind off things. It has also occurred to me that a feature of GAD (ok, so now it's two things) is to overanalyse and try to get to the bottom of things. Sometimes we don't need to. Sometimes we just need to let go and I think your decision to accept your situation is a step in that direction.
Good luck!!