I never feel full what's wrong with me?

Relax, babe. You wisely put this in the "Psychology" section because you are already aware that this is primarily a psychological problem, and a minor one at that.

First of all, slow down the pace at which you eat. It takes anywhere from 10 to 45 minutes after you have physically fulfilled your appetite for your stomach to signal to your brain that you are full, and you might not notice this if you're eating too quickly. And as a "full appetite" is partially a mental thing, eating quickly doesn't satisfy your appetite as much as eating slowly does.

Also, take into account your exercise habits and your diet. If you're eating empty foods - pasta, bread, etc etc - you won't be retaining as much energy as you would be if you were eating healthy foods - eggs, meat, etc etc.

And a watched pot never boils. In other words, the more closely you're fretting over your inability to fulfill your appetite, the less likely you will be to successfully fulfill your appetite. And on a similar note, the more you feel as if you are unable to eat in any situation, the more you will want to eat. Distract yourself during your next meal and I'm sure you'll be full in no time. However, if the problem persists, you could see a doctor if you are so inclined.

Good luck!