I want divorce to my wife because is to hard to live with him .

Dear sir, I required divorce , actually the problem is my wife is mentally not good , she is behave like mad, And there no understanding , she is not follow the rules of family , respect of elder , caring of family, she is always sleeping and not doing any work of daily routine at home. And my mom is diabetic , she required rest , but she is not understand it and always ...... sir , its really hard for me to be with her , some time i wish to die, im completely frustrated , ii dont know what to do , and how, i dont have proof , or else , I,m fear about society , that they think about me, when police came in my house, , its really hurting , please help. just tell me the right way to get divorce normally .