Broken engagement after physical relationship

My parents had found a match for marriage for me on a matrimony site. We connected and clicked instantly. The boy even went ahead and bought an engagement ring of my finger size within 2 weeks. I had always told him about my value and that I would only have physical relationship with the boy I end up marrying. He had also suggested during initial days about Gandharva marriage which will take place in temple and there will be no witness and it has to be completed with sex to which I even asked what if he left me after that to which he said he can never cheat on God. Then we met with our parents after one month and engagement and marriage dates were fixed but my parents were a bit reluctant since there was a 9 month gap between the engagement and marriage so they wanted to shift the engagement but his parents played emotional game and said that they had already informed everyone so we proceeded with the engagement on the said date. Even before engagement he had tried few times of booking room but I had made him cancel. We had a very sweet relationship always with minor setbacks sometimes revolving around marriage ritual and venues only. After engagement we had physical relationship but not sexual intercourse. 2 weeks after engagement my mom was diagnosed with cancer and due to vulnerability and instability I had few times said will not proceed with marriage but then we spoke and everything used to be fine. Then I went for my mom's admission and after I returned from hospital I was alone in room. I had asked him not to come but he still forcefully came unannounced. He was trying for my mom's admission in aiims and while putting all these pressure he took advantage of the situation and forcefully had physical intercourse with me. Next day also he came and did the same and then while he was about to leave I just raised a topic which was in my mind that all of a sudden so much happened after the engagement I just want to show the horrorscope to the astrologer once. To this he started shouting and stormed out of the room saying that he doesn't want to marry me anymore. He completely withdrew and cutoff all contacts with me and my family. My parents and me tried multiple times for reconciliation but there was no efforts from their side and then his father informed that his son doesn't wish to marry me anymore. What can I do about this?