ATHEISTS, I just found out my girlfriend is CHEATING on me, what should I do ?

Dude let me introduce you to the high road. Just walk away. Keep your head up. It is an overwhelming feeling to want to be a jerk or get revenge, but in the long run it is ALWAYS better to take the high road. Tell her you can sense some things have changed and then move on. In time she will realize she let a good one go. I had a couple of long distance relationships and can ure IT'S NOT GOING TO WORK