When my wife was having her affair, she gave me similar "we will always be friends" speeches. She was delusional. I told her in no uncertain terms that if she ended our marriage this way -- having an affair, cutting and running without even working on it, and lying to everyone she loved about it -- that not only would I not be her BEST friend, we couldn't even be friends. Because that's not how friends treat each other.
This should her up terribly, and I think that -- the potential loss of my friendship -- along with the disapproval of her parents and our adult daughters, were the main things that caused her to end her affair very quickly.
Your husband's being a baby, I'm sorry. His atty works for HIM, and can't do anything your husband doesn't want done. His crocodile tears are just looking for absolution for his poor character and destructive choices.