Teacake, I think that probably those of us with PTSD struggle with forgiving those who've harmed us. The pressure to forgive is enormous and, if possible, IMO, freeing. That being said I don't think I will ever be able to forgive those who inflicted the grievous trauma upon me that has tortured my whole family. I don't know about you, I found the pressure to forgive made me feel worse. I "should" forgive. Sorry, I can't, maybe someday...can't bank on it. I felt a sense of relief when I shared with my family, counsel and friends how I actually hated these people and didn't think I could ever forgive them. Weird, what a relief and I don't feel so consumed with rage. The responses from my confidants: Compassion.
Teacake,
What follows is an interesting op-ed in the NY Times regarding forgiveness. I hope it helps.

Sometimes It’s Good Not to Forgive
By ALINA TUGEND
Published: February 22, 2013

It has become somewhat common wisdom to believe that forgiving a person who did you wrong is not just the right thing to do, but will make you emotionally, and even physically, healthier in the long run by alleviating the anger and stress you feel.

But Professor Murphy warned against assuming that forgiveness was always the right answer and that someone who failed to offer forgiveness was “not a good person or a mentally healthy person.”

“It’s a good thing and a blessed thing to forgive, but I am skeptical of any universal sentiment,” he said. “Some people may be liberated by forgiving. Some may be liberated by getting even. Saying that people should automatically be forgiven doesn’t do justice to different moralities and different psychologies.”