My Ex Girlfriend Is Blackmailing Me.

Four years back a girl approached me, after a year of knowing each other, I accepted her proposal of love. We get physical, but after a while I caught her having multiple bfs in her life, I started keeping myself away from her, but she started blackmailing me by cutting her hand n crying all night. After all this, I accepted her again. But again she started doing such things. finally after 3 yrs of relationship I parted ways. But still she is blackmailing me. Just want to know if she files rape case against me, Then will it be file at her native state or the state where we had engaged in sex.? I told her if she again blackmailed me, then I will disclose her wrong doings to her family & friends, on that she responded that her politician father will manage that & no other guy will accept anything. she also threatened me that she will murder me. She uses fake FB profiles with different names for contacting rich guys. she also took 4-5 lakhs money from myself for her education and family support, but she was intelligent, thats why she never asked for online transaction. We were in live-in relationship for long period of time. kindly suggest how should I proceed. I have all the evidences. watsapp FB msgs & voice calls as well.