SC, its great that you and your son can talk about stuff like that. Just keep the lines of communication open and he will be ok.
My son is not angry with my h. He does not know about ow. But I would have thought he would be angry that his father, out of the blue, said he is unhappy and wants a divorce. My son was devastated. But he is not angry. Which I guess is good because I want them to have a good relationship, but I find it odd that my son thinks its ok, if your unhappy, to just bail out.
My h says the same things when I say something about how son is feeling. That son is manipulating me, or he's not depressed because of all this. Whatever.
I so know what you mean about missing the man your h once was. I have known mine since I was 19 and I still cant believe it. But you are doing really well. It wouldnt be normal if you didnt miss what you had.
Just keep praying, keep as much of a positive attitude as you can. Remember that this is his journey. He has to take it. You just have to be there for yourself and your son.