I don't understand,

I don't understand people. I don't understand what drives them to do the crazy things that they do. What makes a girl obsess over a man who has twice rejected her in the most cruelest way? Or that a girl would give up on class solely based on the reason that it is not required for her future. What makes a man sacrifice his family's happiness for the small possibility for becoming rich? I don't understand any of this at all. I don't understand how people can be so stupid.