Forgiveness for someone for me comes when I am able to forgive myself first. In situations where I have been wronged my accountability was allowing it to continue. The anger I felt toward the other person was masking the anger at my own inability to extricate myself from the situation, and allowing that type of behavior to go on.
The worst offender of this was my previous relationship which was very emotionally abusive. Once I forgave myself, I moved on quickly. Now when I think of him it's without anger. He is just someone I used to know. I don't know if that's forgiveness per se, do all people deserve "forgiveness"? I think its more acceptance of who they are and not letting what they did bother me anymore.