Cheating bigamy

Dear sir, I am 34 years old women 13 years before I started to live with my boyfriend in live in relationship. 6 years before we got marriage in Arya samaj Mandir in new Delhi,one year before I got to know that he was already married before me and he has two kids, I have 18 months old daughter, He made me very much fool,I remember one day in evening he started to cry and told me that his father had cancer and he has to go to his village to take care for him,I cried with him pack his bag sent him to his village ,it was time when he got married, I have no idea when did he destroy photos and videos of marriage, But I still have marriage certificate, He used to continue stay with me even after his first marriage and still he lives with me,but he still didn't make birth certificate to my daughter always makes excuse and saying kid who has no birth certificate they also live and eat strange !, He use to abuse me every day even he abuses my parents, Saying that I ask car and 10 lacks rupees from my parents cuz why will he feed me and my daughter, Every day for me like night mare, I am enough with this Life I don't know what I am doing in this planet, My marriage was hidden from my family, No one knows about my marriage in my village, He always pretends very nice infornt my family or some one is there in front of us, After they gone again he starts to abuse , beating .. Throwing food on me.. We both are Hindu but from different cast and belong from Bihar, What should I do now legally please help me , I am not working and I even can't pay legal assistance, Please give me your valuable suggestions (Now I regret a lot and very much ashamed to be with him in live in,and hide all from my parents)