Self-pity is an opiate.
The most insidious problem with drugs is that the human body develops a tolerance for them and requires larger and larger doses to achieve the same effect. The same is true with self-pity. The more you allow yourself to indulge in it, the more you will require. Soon, self-pity will become a habit, one so debilitating that you will rob yourself of all the potential you possess. Happily, there is a cure. If you truly analyze the situation, most often you will find that the problems that have driven you to pity yourself are mostly of your own creation. It follows, then, that the best person to remedy the problem is the person who created it: you, yourself.