My best friend and Ex having strong feelings for eachother what should I do?

i know exactly how you feel :( no one deserves what your going through right now. its on your friend weather or not she actually wants a relationship with him. with the way he treated you idk how she expects him to treat her any differently. i mean come on >.> he sat there and texted you how he wanted sex and when he realized he wasnt getting any he moved on to your best friend. he sounds like a man hoe. honestly? who th ef does he think he is thinking he can go around and play with girls and their emotions. dont let this get to you :( idk if you believe in karma in not but what goes around comes around and sooner or later that guy is going to get whats coming to him. i cant stand it when guys literally play girls and the girl thats getting played is too dumb at the time to realize it -.- and all i can say is "wow" if your friend actually sat there and believed all his i love you BS. especially for what he did not to long ago before it. eventually this is something thats more then likely going to tear you and your friend apart, just prepare yourself for it so it wont hurt you as much as it could in the end :/ i wouldnt even consider her a friend anymore >.> shes choosing a guy that treated you like crap over you. you cant stop them from doing whatever they want to do but sooner or later that guy is going to get what he deserves for treating you the he did.