Blackmail and torture by live in gf

1. I was married and during pendency of my divorce case I got into relationship with another girl. She initially told me tht she is with me and will help me get out of the mess. But after some tym she started blackmailing, taking money from me and threatening me tht she will tell my previous wife abt our relationship. I kept on tolerating and now I hve got final divorce decree. I wanted to marry her from heart but her threats, fights and blackmail has made me so afraid of her. 2. Now my gf has forced me to take a house on rent and she is staying with me. She has taken 5 lacs from me and she told me tht she will leave me. I hve her recordings to prove tht. I hve told her very clearly tht our relationship is big failure and if we marry then it will fail. She fights daily, threatens me and has made me her slave. She threatens tht if u leave her she will file rape case. Wen I ask abt 5 lacs, the she gets more angry. My life is ruined. she threatens me to tell my frnds, colleagues and all. There is no way to do this socially. She is beyond all tht. I feel like committing suicide. I m. Trapped badly. She has taken so much money from me. I know abt one side Indian law. Wht can I do. She is still staying with me ans she still has tht money also. 4. Sometimes I feel u shud marry her to avoid rape case and then leave her. Sometime I feel I shud go to police but afraid of our indian laws who put rape allegation on anyone.