DOES DEPRESSION REALLY EXIST OR DO U MANIFEST IT BY BELIEVING IN IT ???

It exists, but it's largely thought to be situational now and less genetic or brain wiring. Over and over, when you improve a person's conditions and options, then they shift their worldview, depression resolves on its own. Depression appears to be a reaction to a situation rather than the situation itself.

This is a broad, broad explanation and each case should be properly evaluated.