What else could I have done?

[antlers]

I have been divorced for a year now. Prior to that we had an 8 month separation and then a very nasty 13 month divorce. I recently found out that she's now involved in a committed relationship with a man that she worked with over 10 years ago while we were raising our family. It does hurt...even after all this time.
I know she still hurts. I've been apologizing for 3 years. Maybe that's not enough to address the pain that I caused her. But what more could I have done...other than not screw up in the first place? I'd take it all back if I could. I had remorse, I apologized, I asked forgiveness, I did all I could to atone, I went to a Love Without Hurt Bootcamp, I took a Compassionate Parenting course, and I went to counseling. 'I am not the same person I was in that relationship'.
My behavior truly was reflective of how I felt about myself, instead of how I felt about her. I'm sorry that she still hurts...I remember each and every thing that she remembers.
I'm struggling to 'let go'...the emotional divorce is harder than the physical divorce.