I broke up with my ex 1 year ago who I still have feelings for. I just found out that my good friend has been dating him over the last 3 months. I have had conversations with her over this period and she never told me about this. Last wk I ended up being with my ex again and he then told me that he had been seeing my friend, but that it was a mistake. What do I do? I know I don't own either of them but I'm livid with my friend for not telling me and I really do miss my ex. I feel that I can forgive him but I am furious with her. Do I blank her for good?