ASSALAMUALAIKUM,
Did You Forget What Allah Says in the Quran?
Surah Al-Kafirun(109)
109:6. Your religion is for you and my religion is for me"
in this case, we can't force her the convert to ISLAM. Let her think..
WALLAHUALAM...
ASSALAMUALIKUM,
If I right, there is a story of Prophet Muhammad in the VEDA(THE BOOK OF HINDU). Muhammad as the last messenger. I suggest you to study this. Because, ISLAM is the right way...
p/s: Sorry, my ENGLISH is not very good :D