Forcing for marriage or leave job and stay in home, but parents will not let me marry with my choice

I am 25 years old and my boyfriend is running his startup at -10-15K monthly income. he is from SC caste and I am from OBC caste. I told parents about him to my parents they asked me to come home as brother said parents are in huge tension. I went to home and told them everything, father insulted me on my character and his family's character. they asked me either levae the job or leave him and continue job. I accepted that I'll leave him but I am not happy. They sent me for job. We again thought to convince once again but i got rude reply and shame to society like things. Parents came to my room and I again told I am not happy by leaving him just meet his family first. they agreed but agrresively. I was just lying. Again by cousin came to room and I told him the story he convinced me to go home he'll talk my father. I went to home but my parents pressurized him that they are totally opposed to it. Father slapped me 2-3 times when i was in home, I tried to run away still he grabbed my hair and pushed me inside the home. After that, 2-3 days continued fights was there between us. They never agreed. I asked them if I have to go for the job they said yes after a week. I went for a job, my parents sent my cousin, a cousin was pressurizing my boyfriend saying come and meet me. He didn't pick up the call. again sent threatening messages to him. I told the story to my mother, she was also involved in this. I got no one is help us I tried to suicide and saved somehow. now my brother has to home from hospital for last 2 months. I resigned from my job in Feb, now it's May, I told my parents about the offer and told them that I needed to join a new company, they put pressure on me saying leave the job or else leave my boyfriend. I said I won't leave my job you can continue searching for boys. They are doing so much hurry I am just calm because I want to go to the city and join a new company. Hope after that I will not be in a trapped family and can inform the boy that I am not ready for marriage. But I don't know what to do. I am totally trapped as boyfriend do not have legal right to do anything.