You should read allat. It's important as for she knows if you dox her, she can dox you back.

Real quick PSA; I do not want anyone harassing my girlfriend just for cheating. I get she's a bitch for that (probably, it depends on whether or not the rumors are true) but I still don't want people doxxing or harassing her on social media. If I break up with her, I don't want ANYONE talking to her. If SOMEHOW in SOME WAY she starts talking to you or spreading rumors about me, ignore her and block her completely.