Originally Posted by
outtolunch 
Cheating has all to do with the cheater's lack of integrity and nothing to do with the person being cheated.
Cheaters rationalize what they do by blaming the person they are cheating on. It's classic manipulation.
He is not worthy of your time, energy or your tears.
Please close the book on this chapter of your life.
Perhaps some grief counseling is in order here.
Not only has he been rationalizing his infidelity, but she is rationalizing it as well. Telling you was a way to make herself feel better, not to help you.
IMHO, the deserve each other. Why she thinks he is not going to do the same thing to her is beyond me. But then again... they are both addicts... so there is no real logic or rationality at play here.