Mental Harrasment by my wife

We got married in year 2000. I left my parents and started living seprately with my wife and daughter in the same year in other part of Delhi and still living in rented accomodation so far. My wife had deep inclined towards her mother and brother and she is mentally harrassing me since July 2019 and we are not in talking terms since then, they both have kept me in isolation and I remian quite and fearful of both. In year 2020, dozens of times she mentioned that she will divorce me and live seprately. In Sep'2020, she said she will leave me finally in Oct'2020. I have undergone severe level of isolation being under the same roof. She also said that she will live in PG and she also said that her mother give her one entire floor since her mother has 3 stories house in Delhi. I am bearing all expenses since year 2000 and take care of their all needs and wishes. They are not bothered about my health issues since I have heart issues. I take my lunch and dinner own my own. I asked my wife multiple times what are the issues but she doesn't tell me. I, 53 years old remain sick and workng in a private firm. I have many questions but core question is we are living together and how I can resolve the issues in terms of differences what we have or how I can go for divorce being under the same roof. Request your guidance and support.