1. Ending life is cowardice. You should gather courage and immediately file a complaint against her for the offence of causing hurt under 323 IPC and criminal intimidation under 506 IPC. Thereafter, if she files any complaint it will be a counterblast in the eyes of law.
2. Furthermore, if you apprehend harassment and danger to your life at her hands then you may file a petition for protection in the High Court under Section 482 Cr.P.C.
3. Act swiftly before she makes the first move and files false cases against you. Engage a lawyer asap.