I am new to posting here but have been reading for a while now, so take my advice for what it's worth ! :-)
I am so sorry for your situation. I know how hard it is to get that wake up call when it is possibly too late. When I would beg and plead or explain to my husband how we could make this work he just said I was bullying him and that wouldn't make him change his mind. I said "but you don't hear me". He said " I do hear you. You just cant force me to change my mind. Your determination to fix us isn't going to do it."
I found this site and realized I was just pushing him away farther. I was making him defend his position and dig in his heels. So I have started GAL and doing 180's. I have accepted responsibility for my part in the downfall of our marriage and have assessed what I need to change. Change for myself that is....... These changes will also be good for our marriage but will allow me to maintain who I am and who I am comfortable being.
GAL for you will be good and he will notice the changes even if he doesn't comment. He will also wait to see if these changes are real or temporary to try to "fix" things. Continue to read here and reread the book. Post as much as you need to and become an awesome actress around him. Act as if you are okay until you really are !
Good luck with everything and I can't wait until we can post our success stories !