Do u think Marriage is must for human ?

Definitely not. I think marriage can be quite nice. Or it cannot be. People can definitely make it on their own, particularly in this day and age. However, I suppose it depends on your society. I think by our nature we like to be with others, but whether or not we need to be married to do that will depend on society. I am married, but I am pretty sure I would have been fine if I had never married, especially in the United States. I know there are a lot of people from India on here. It might be harder there, especially for a woman.