Once you get to know the worst of people, you either withdraw from them or you simply fall for them. Not "romanticly" only but because of acceptance. You see, love and acceptance go by hand. The mere fact of not hoping or ilusionate is acceptance and applies on anything.
You ask me what happyness is; I would likely answer: now, today, this precise and exact moment and not any other since any other is uncertain, is unreal.