I want to file my divorce.please give me some legal advice.

I am Amrit singh.my mife is Always bother me and my family.she is always tense my mom.first my in-laws cheated me because they don't told me my wife was alredy married before marry to me....after marriage my family know everything.but we accept and forget it.but it's two years completed to my marriage my wife is doing bad things to my family.amd she always saying I will send you and your family into false dowry case and violation. Her family is a rich family and they support her ...my mother have high blood pressure always and high sugar level because of it..I want divorce how it possible pls help me.i am from a middle class family.pls help me.