You should forget them both...A friend is not a true friend, who, by knowing how hard he was on you, still goes ahead- spits in your soul and dates the guy you were so in love with...First of all- it is not nice. It is ugly, humilating and disgusting...Very cruel step done by both your friend and your ex, who, unfortunately did not care much about how you will feel or what will you think if they get into a relationship.\n\nI suggest to forget them both and move on...There are millions of other GOOD people whom you can make friends with...You have to just keep your eyes and heart open. And forget the past- cannot return it back anyway!