Found of a guy friend of mine is cheating on his Girlfriend (and he doesn’t know I know his cheating) who I have never met before, and I just feel bad cause she seems like such a nice girl from what I have heard and she doesn’t deserve to be treated like this. This isn’t the first time apparently , and it not like it’s one girl there are so many and he texts them dirty things hooks up with them and I feel guilty now, cause I know what’s going on but do I have a right to tell his girlfriend what his doing??