text: Your friend may need to talk to a professional to help with her mood.  \nI do have to question why she would think this guy is perfect when she believes he was cheating on her?\nTell her you're worried about her, don't trash the boyfriend, she will only feel the need to defend him.  If she feels like talking about him tell her you're willing, but only so much, be careful of "poor baby syndrome".  Try finding something fun to do that will lift her mood.