Physical and mental abuse

Hi, Its been close to 7 yrs since i got married. Mental abuse started right away and continuing till now. Baseless false accusations, no respect, trying to put me down in every way is like now every day activity. Husband asked to quit job as i refused to give my salary entirely. So forced n changed al my bank account phone no and started doing transactions. Even single rupee i have ask my parents. Isolated from close frnds n family completely even neighbours. If i ask anything blackmail me by sayinh wil do that to ur parents also..wil cut ties.. Physical abuse startrd since 3 yrs..left the house ..everybody convinced both parties to end al considering future of my baby girl. Abuse never ended tho..feeling vry depressed.. tried to end life but for my baby sake i left that thought.. Few imp questions.. 1. Backmails me emotionally by baby..if i leave house one day also not possible n try to bring baby back..how cn i run away and get temporary custody simultaneously filing divorce case? 2. How wil i b able to show proof for mental abuse..will finance details n isolation from family n frnds permitted in proof..? 3. He Wil never agree for Mutual..what are the chances of getting seperated by consented one? Need legal help..dying day by day..