I am one of those people who gets friendly with people easily. If I like you for more than a week, I'd probably help you with anything even if I don't really know you that well. I don't do it because I want to get something from you, I do it because I want to, that's the way I am, that's the way my parents taught me to be with people... "Treat people the way you want to be treated". In return, you expect people to do the same, but they don't always do.
Wouldn't it be nice, though, if the world just stopped for a second, and thought about other people instead of just themselves?