How to proceed for divorce

Dear Sir,

I am married from last three years and from the day one of finding one partner for me, my family had a very clear concept that we don’t need dowry. we r from a upper middle class family and i m a gazetted officer. Finally i married to a girl from a poor family purely on the merits of girl. The father of the girl was not in this world(dead) before marriage. The sister and jija of the girl, who initially came for marriage talks, clearly told us that we can give u only and only girl and nothing more but the girl is a gem. we accepted to this proposal and finally i got married to this girl. She took some gifts with her but we never demanded the gifts, even we didnt do ring ceremony so that they don’t get burdened

After marriage, i m under constant pressure and she is mentally torturing me and my family. she talks rudely with my mother and later on puts whole blame on my mother. She constantly gives me threat to suicide or leave the home. She is insisting on living separately but i don’t want to leave my parents. I m confused and i want some way out. If we go for divorce then we have not heard many happy stories. please advice, how can we save our skin