I have been blackmailed by a friend about harming my family and spoiling my reputation. Please help

Hello, I had a friend. I trusted him so much. I had marital problems. I had shared some of my personal problems with him. He was talking very caringly and he was nice to me as well. Then he started asking for business partnership and asked money. I trusted him so much and I agreed. After that it didn't proceed further. But he started requesting for money saying some serious problems every time and promised to give back money within a week or two. He never gave back the money. I wasted around 5.5 lakhs in 2 years. Most of it was borrowed from banks and I had to repay with interest. From Jan 2021, I stopped responding to his messages and phone calls as I was frustrated that he is misusing my friendship and never give back money and it was very difficult for me to repay the loans and manage my family expenses in tough covid times. But he started threatening me that he will talk to my husband and father and tell them that I had an illicit relationship with him which is not True. When I told him that I will file a case of blackmail, he started threatening me that even if he goes to prison, he will take revenge on me, and my family once he comes back from prison and make me regret my whole life. In the fear of his words, in this 1.5 years I have given him 8 lakhs. Most of it is borrowed from banks. Due to so much stress, I have spoiled my health. Gained so much weight, have lot of health issues and I have now joined a job only to clear the loans. I am not having enough income to manage both loans and my family expenses. Every month I am taking small loans and doing part time weekend small jobs to make the ends meet. It takes another 4-5 years to clear all my present debts. Now he is still asking money from me. I cannot give him anymore money. I don't want my family to know about this. It will definitely create more problems in my marriage, it might affect my daughter and my parents will never trust me in future with anything. I want to know if I can take the help of a police or a lawyer to warn him not to contact me again and about severe legal consequences if he contacts me or my family members. Pls help. I don't want my family to know anything about all this.