Live-in partner forcing me for marriage

I am a IIT Bomby graduate. In my final year of my Btech I dated a woman and after a few months I moved to her place and we lived in for around 2 years. She is a widow and her 5 years old son is staying with her maternal grandparents in Faizabad UP. She is a woman of progressive and practical thinking.She holds a very high position in one of the leading MNC in Europe,headquarter in Mumbai. As we were staying in livin our mutual understanding was good and mature enough. We understand that we don't have any personal obligation to each other.In Jan 2022 we mutually decided to end this relationship as she probably found a life partner for her . She again reached out to me a couple of weeks ago.This time things are bad. Something went wrong between them and they didn't marry.Now she is forcing me to marry as I was livin with her for couple of years. Now I am afraid, as marriage between us was never an option between us. Can you please suggest me some legal way, which refrain her from forcing