I have a cheater problem and I need help

Hi. I need some ones help, to help a friend. I have a friend who's boyfriend is cheating on her pretty bad. With lotts of girls and he's hit on me too. I never said anything before cause I felt wierd about it. Well now he's sleeping with another girl we know. He used to be really nice to her and now he's mean but won't let her go. She loves him but I guess she won't let him go. I saw him with this other girl myself so it's not 3rd person info. I can't tell her cause I saw them 3 weeks ago.i waited too long cause I didn't know how to tell her. I need someone to send her best friend a message exposing him. So it doesn't lead back to me. I know she will tell her what the message said. And she'll finally know/ move on. I don't want to put her number on here. If you can help me out can you message me?

Er... The fact you're asking complete strangers to volunteer to message your friend with the dastardly news is not only wholly unrealistic but also suggests something's not quite right here. If you want advice about how to do it yourself *and* come out of it initially relatively unscathed (possibly completely) and longer-term not only scar-free but placed in higher regard than ever before - THEN I can help.