No one should ever ask themselves that: why am I unhappy? The question carries within it the virus that will destroy everything. If we ask that question, it means we want to find out what makes us happy. If what makes us happy is different from what we have now, then we must either change once and for all or stay as we are, feeling even more unhappy.
To be rejected by someone doesn't mean you should also reject yourself or that you should think of yourself as a lesser person. It doesn't mean that nobody will ever love you anymore. Remember that only ONE person has rejected you at the moment, and it only hurt so much because to you, that person's opinion symbolized the opinion of the whole world, of God.
It's everybody, I mean. Everything everybody does is so — I don't know — not wrong, or even mean, or even stupid necessarily. But just so tiny and meaningless and — sad-making. And the worst part is, if you go bohemian or something crazy like that, you're conforming just as much only in a different way.