I don't know what she would like, but if it was me, something I've always wanted a guy to do was to plagiarize a प्यार poem substituting my name and his for the poem's characters.
Mmmm....you can always try jewelery! Buy her a bracelet and chocolates, girls प्यार chocolates,I prefer them. :) mmm...what else? या an album of चित्रो hmmm