ND, You are going through a severe emotional impact. Right now, it's understandable that part of you wants to keep it going, but the other part doesn't know if you can. We've all gone through it. You've been betrayed by the one person you're supposed to trust the most in your life. Right now I know your anxiety is out of control.
The best decision you can make right now is to not make any decisions. Give it some time. See how she responds to the fact that you know now about the PA. It may be a good thing that she went to a friends house -- it gives you both time to calm down and think.
Hopefully she'll be able to talk to you more constructively now that you know -- and not use you as a whipping post. Those are hateful words. Just remember we all say things we don't mean in anger and anxiety.
