I'm a christian boy and I'm in love with a hindu girl.both of us are from kerala.now she is in delhi working as a nurse ,what are the formalities and how can I conduct reg marriage in delhi

I don't know if this will help, but maybe it will give you a place to start: Christian Law of Marriage in India - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Christian_Law_of_Marriage_in_India#Marriages_to_be _registered)