BDS, My heart goes out to you and I hope you do not suffer anymore from this loss. Do not look for explanations to why because it is very apparent why and it is not worth giving her the satisfaction that you even care. Women can be very selfish and when they feel like there is a better deal elsewhere some women have no problem shutting off their emotions to us and giving them to some other guy. Remember, she thinks she is doing better and really does not give a fuck about your feelings but there is something she is not seeing and that something is KARMA. KARMA is the payback that evens the score when a wrong is done. It may take a minute to happen but what goes around REALLY GOES AROUND. You are a caring, emotional man who will persevere and come out on top. In the face of betrayal it is difficult to see anything positive but in time you will see why everything happens for a reason.