Doctor, I am a 23 yr old girl from Hindu community. I love a Muslim guy and this relationship goes for about 4 and half years. Both of us fight very much and love each other a lot. We also had sexual relation many times. However, my parents wanted me to forget him and marry someone else. This is which I can never do any time. I feel I cannot live against my sub conscious mind. Can I live happily with him is my question. Will society allow Hindu girl and Muslim guy to exist happily. In addition, I masturbate and feel guilty later. I even promise on god that i will never masturbate again but I do it. Is it bad? Please tell me doctor. Thanks in advance.

Happiness in marriage depends upon both of you. Society may not accept your decision but understanding between both of you matters. Improve understanding to reduce fights.
Masturbation is normal physiological act and it does not cause harm. You should not feel guilty about your normal physiological urges.