I am Hindu and I am in love with a Muslim guy. My love is very true, I can't live without him. I wamt to marry with him but its sure that my family will not accept him. Neither his family will accept me. What should I do in this condition?

Not a whole lot, maybe wait until you're both 18 then your parents can't say anything, but if parents are stopping you from being together, than you both are not in love, because love is worth fighting for, even parents.

What's more important, love and marriage? Or parents, culture, and tradition? When you both have the same answer, then you will see a path to follow.