How can I get my child's custody if he is 2.7 years old?

is father of a child no less than a beggar in indian law, my wife is a child specialist, she has not been staying with me since more than 2 years. I cant keep my child at night with me. my child is 2.7 years old. He is very comfortable with me. But i am threatened about police complaint etc. She is willing to take a mutual divorce, but obviously she is not willing to give me custody of the child. Hence my Question is : ISNT a father nothing less than a beggar in indian law. we just have to give into a girls demands. i am hindu by religion.