What gives us the right to be happy?

My title says it all. What really gives us the right to be happy? A chinese saying says that 'one must go through the bitter, before you can taste the sweet'. Is that really true? that we must all suffer through the bad times before we get to have the happiness that we have earned. So is a person supposed to be unhappy if they have never suffered through any of the bad or bitter times. For my whole life I've always lived like a king. I rarely do housework as a kid, only sometimes the dishes and vacuum and mopping the floor. I got almost anything I wanted, I got all the video games, I got all the clothes and newest laptops. Even now, I have the latest phone and the latest gaming consoles. So according to the chinese saying, am I supposed to be miserable until I've gone through some hard times. Maybe I never really deserved this happiness.

At this moment, I feel like someone had made a mistake in my life and given me all this happiness and good times which I never really deserved and is about to be all taken back. I'd like to think that maybe after this hard time that i'm going through, I will evenutally get the 'sweet' back.  I have always believed in things such as karma and what comes around, goes around. I know there are those that think these are just things innocent and naive people say, but I really do...or at least did. But right now, I am seriously that even if you do good for your whole life, sacrifice everything for your family and friends, all you get is pain and suffering. There is no cycle. There is no karma. Maybe it is what nice and innocent people say even when things go wrong. So why don't we all just break the law, do bad things...its all going to be the same outcome. Just look at all the rich people in the world...i bet you all of them has done bad things just to get to where they are.