Scout, this is the part that stood out to me:

"I know there are marriages that end in mutual respect, kindness, sorrow, regret."

I have been telling my H, whom I call OD, that I want to end our marriage with kindness and respect. We are not there. But in the last year, I have behaved that way whenever I could. That is the only part I can control. For me, that means not taking the digs, not pointing out the flawed logic, not getting sucked into conversations that are going to go to a mean place. Unfortunately, I think in my case, it is making it harder for him to get through it. I think if I were uglier, it would be easier for him, but from a personal integrity standpoint, I am not willing to go there.

Own the part of it that you control and leave the rest be. I am very impressed by your attitude and your understanding that this is not the end of you. Your life will go on in a fabulous way with people who deserve to be in it.