Divorce

My husband family asked dowry after 3 months of marriage and keep on creating some or other issue in marriage. They disrespect my family .. don’t go in family gathering.. misbehaved with my relatives or family.. return gift when given ..take out monetary value of gift every now and then... it’s been 5 years of marriage but nothing settled down My husband has got mentally ill 2 yrs back and keep saying that I have done some black magic on him.. I tried to help him thinking his mind will change if I be with him in difficulty.. but he has got more aggressive and at times try to physically hit .. abusiveness is a daily case.. to me as well as my parents .. it’s been a month I am back home and thinking what to do .. can you please help with the laws 1. How much time does it take to separate 2. What happens to the jewellery gifted to family or parents 3. Can I seek help of police for protecting my family and me..as I don’t know he might try to harm my family 4. Do I need any proof to substantiate what I am saying.. what kind of proof may work 5. He keeps on saying go for mutual divorce . Is it justified ? 6. We are not able to develop relationship during this 5 years becoz of dowry things and fight between us .. can he blame me