I'm here with you Jose, I feel your pain. And the MEM quote above is dead right.
BUT - you've got to stick at it. Why do you take the pictures you take? Because somebody else wants them that way, or because you want them that way? Do your own thing, what feels right. That is the best definition I can think of for art.
Anyone who produces work for a market, whether it's print media or a gallery, is pursuing commercial art. They are satisfying a commercial requirement. It's actually not that hard to do, you've just got to follow the crowd.