Need help!

Soo.. The NH has found his next victim. It's a woman.. That he goes to school with. I don't know why but I am CRUSHED. I have Googled her.. She is the perfect victim.. Suffers from depression.. Like me. Single parent.. Like me. I want to send her a message.. Warning her that I have found him with a man.. The warning no one gave me.. I feel CRAZY. Devastated. I hate him!. I broke NC.. he told me he hasn't been in love with me for YEARS! "I am not in love with you". Well no shit.. He's been screwing MEN! and now he is after this OW and her kid! Ohhh I just want to tell her! I FUCKING HATE HIM!!!! WHY does it hurt so much?