It took me a long time to realize that I needed to let go of the anger and resentment for ME. Not for my Xah or A son or my brother or my parents or anyone else.......no one but me. Anger and resentment just don't feel good to me. When I truly let it go, it wasn't really a forgiveness.....it was a release. A weight off MY shoulders. I eventually realized that the anger and resentment was doing more harm to me than it was to those I felt it about. I was feeling those icky feelings while they went on their merry way feeling "ok". I let go for me.
I hope over time you can do the same.......for you.......in your own time.