I also believe that XH will someday really regret his actions. I am with you...I would never go back and I never thought I would say those words. Current wife (and former friend of mine) was the proverbial straw for me. Once she entered the picture in that way it changed my feelings of ever reconciling.
I, too, am so grateful that I followed the DB path. I am proud of my behavior in all of this. With the exception of one situation, I would not changed how I handled everything.
I hope you continue to get stronger and happier. Hugs, Peace!