Model for Betrayal

Please help me come up with a model to deal with a friend’s betrayal. I know that the word “betrayal” is already my thought and feeling about a situation. The C doesn’t really matter, because it is always neutral. However, my reaction to C is that She did something that I consider to be a betrayal of trust and friendship. My feelings are that I feel betrayed (hurt, angry…) The R in this case is that I don’t trust her anymore, I want to keep my distance from her emotionally, and the friendship is tainted.

I realize that another aspect of R is that I don’t or haven’t forgiven her, and that bothers me, as well, since I know what poison it is to harbor unforgiveness. I just don’t know what model to set up to be ok with it and move on.