I think OP is exceptionally lucky in that he still has friends and family in India. It's very different for me — most of my childhood friends have actually moved out of India, and I can't stand my extended family. Maybe it's a socioeconomic thing.
OP's experience may be a combination of having a good situation to go back to, and not really fitting in with American culture. And although you could argue that American friendships are not as deep as ones in the Old World, some of that is just the reality of adult friendships.