How to handle being cyber-stalked and stalked outside too?

[corporateanalysis365]

I am being stalked by this girl who is bent on ruining my life. She already did though, she stole the guy I had a crush on, turned all my friends against me, made people hate me. I had an emotional breakdown and now am being treated like an undesirable in my town. She basically stole my life. Bad things are happening to me, like people on the street say awful things to me. She is an ex-coworker and she bullied me to death that I had to quit. I have PTSD now...and haven't been able to keep a job. She is trying to make me delete all of my social media sites by having her friends bully me. I'm going to kill myself, my life is ruined.