Please do understand the following things;
When a crime is happened the police will prepared FIR (a written document - a complaint lodged with the police by the victim of a cognizable offence or by someone on his/her behalf ). Even a telephonic message can be treated as an FIR.
An FIR is a very important document as it sets the process of criminal justice in motion. It is only after the FIR is registered in the police station that the police takes up investigation of the case. The procedure of filing an FIR is prescribed in Section 154 of the Criminal Procedure Code, 1973.
The process of investigation includes, but is not limited to, collecting evidence, questioning witnesses, inspecting the crime scene, forensic testing, recording statements and so on. If the criminals are found, the police will make arrests.
Once the investigation has been concluded the police will record all their findings and file charge sheet before the concerned magistrate under sction 173(2) CrPC. If it is deemed that there is enough proof on the charge sheet the case goes to court. On the flipside, after their investigations if the police conclude that there is not enough evidence or proof that a crime has been committed they can close the case after justifying their reasons in court. If the police decide to close the case, they are bound to inform the person who filed the FIR of their decision.
There can be no action for breach of promise unless a contract to marry has been made. A declaration of intention to marry another made to a third person will not constitute a promise unless communicated to the other person on the authority of the person making the declaration. While it is not necessary that the mutual promises should be concurrent, both should be made within a reasonable time of one another. An action for breach of promise to marry may be taken by a man as well as a woman. In modern times there have been instances of successful actions by men.
The Madras High Court bench in November 2012 said that rape as under IPC section 376 does not include the indulgence in consensual sex with a woman under false marriage promise within its fold but cheating as defined under IPC section 417 is a punishable offence under the said act.
Distinguishing consensual sex and rape in May 2013, the Supreme Court held that having consensual sexual intercourse with a woman, with the will of marrying her, cannot be regarded as the commission of rape by that man, even if they do not marry afterwards.
So in your case file an anticipatory bail application before sessions court / high court.
Then approach the high court for quashing FIR. If the high court refuses to do so then face the trial proceedings on merits.