Yes, In both Hinduism and Christianity, they allow civil marriage according to the country laws regardless any religious requirements or restrictions. Accordingly, a Hindu boy and a Christian girl can marry through civilian marriage.
The way that they could marry people is by them both looking at up at their and asking them if they could marry someone from a different religion. If something good then happened to them the answer...
of course you can.. whether you will be accepted by the Hindu girls family is the question. and that answer has so many variables.. try it and let us know.,.