Please I need some help? ?

I am a Muslim girl of 21 years of age from Pakistan, I love an Hindu Indian guy, I want to marry him, he is 22, can I take the citizenship of India before marriage, how much will it cost, and how much time will it take, I have to do this without my families consent because if they will find out I'll be dead. Please some body help me, I have my pport, what other doents will I need and how much time will it take? Please understand my situation and guide me somebody, I am from Karachi, help me.