You seems to be mentally disturbed. You must teach him a lesson. The law is in your favor. You can put any number of cases upon him and see that he is come to India again and face the trial.
Is consensual sex, under the promise of marrying a woman, rape under Indian laws?
It's probably not rape. But:
Section 376 says that sex is rape if it is without the woman's consent.
Section 90 says that consent obtained via "misconception of fact" is not really consent.
Based on these 2, some high courts and lower courts have held that sex based on a false promise of marriage is rape.
However, there are 2 supreme court cases which hold that a promise of future marriage is not really a "misconception of fact", and the man is allowed to change his mind later.
So, technically, sex under promise of marriage is not really rape in India, but either through ignorance, or some other circumstances of the case, you could get a judgement against you.
The Patna High Court and some lower courts have held in similar cases that consen
sual sex under a promise to marry amounts to rape because of lack of consent.