Violence by father repeatedly what to do

I am 24 year old female. My father is a govt servant and has become quite rich by corruption. He also has many contacts. The family on my father’s side is from rural background and only my father has got money. Thus my chacha’s family and 3 bua’s family are dependent on him. My father is a very arrogant as well as very superstitious man. He is a fanatic Hindu Brahmin. He also has extreme anger issues . He has been beating and abusing me since I was a child. He has said very bad things to me and that I will never be successful in life. He disrespects women. He is also doing electricity theft. He takes bribes shamelessly. He has psychological problems and is extremely orthodox. He has always beaten me up with wipers and canes mercilessly. Now when he came to know about my boyfriend who belongs to SC caste but is very loving and good person, my father threatened to kill him if I ever married him. How should I marry my boyfriend and cut all ties with my father once I get a job?