I've been at this a very long time. I've been HERE for over 3 years. I can feel your pain. I still have pain that comes and goes - but it does come and go now. I don't have that mind-numbing all constant pain that I had in the beginning, the pain that you are experiencing now.
I KNOW that the only way you will feel better is if you detach, and do the time. It is not something that can be rushed, and EVERYONE is different. Live for yourself. Let him go. I still "stand" for my marriage because it is still right for me. I am not standing still. I am living for me and for my kids. There really is no other choice right now.
You are in so much pain and are experiencing so much anger right now that you can't hear what those that have been here much longer are telling you. Read and re-read and process. Learn and KNOW that this time is for YOU.
"Do not look back in anger or forward in fear, but around in awareness." - James Thurber