Cruelty, divorce and sole custody of girl child

Me and husband got married 3 years back. We have a daughter who is 2 years old. We were staying at UAE. 6months back i came to inida due to some neurological problem and got treatment here. These 3years my husband has physically and mentally abused me even in front of my child. At first I didn't tell anything about this to my parents. When ibwas staying at my home my parents understood that me and my husband has some issues between us. Inorder to convince my parents he started contacting my parents to talk bad about me and even told them to take me to some psychologist as I have some mental problem. My parents didn't believe me as he has convinced them. During our life together, I have taken pictures of all the outcomes of his physical abuse. Only after seeing that, my parents started believing me. Now my parents know everything about him. I have recorded all his voice msgs after I came here which is evident that he was mentally harassing me. His parents supports him. One year i stayed with my in laws after delivery that time his sister was staying there and she used to sent my faults to him via msgs which increased his anger towards me. I understood this when I saw her msgs in my husbands phone. I don't have evidence to prove that she was playing against me and making my husband against me. Now I can't live with him anymore. I want to go for divorce. I need sole custody of my daughter. I can't live without her. From birth til this date I am with her. My husband used my daughter to torture me. He even don't want to know about her daughter. Now he is asking for daughters custody. What to do.? I need my daughter. If custody is given to my husband, I fear that he and his family members will make her hate me like they make my husband against me.pls advice me.