Need a suggestion how to proceed further.

Hi sir, I am Hindu, 31 year old female. I am married 5 years ago. My husband is having extra marital affair before my marriage, but I don't know before marriage and I came to know this after 2 months. But he is saying that he just speaks with the girl and has no physical relationship. I said not to talk or contact her from then and he said he will not talk again. But secretly speaking to that girl. He is addicted to alcohol before marriage itself but I don't know till I married to him. He not even cares me and he doesn't give a single rupee in the home to manage things. I said so many times to change his behaviour and not to talk with her but he says that he will not do again and he repeats it again. I have no children. I had 2 miscarriages. I am not able to tolerate this. Actually he is my relative, he said he loved me and talked to my parents and married me. Now he says that he likes me. But he never care me. I no able to understand how to deal with this situation. Please help me.