So long as you love the art you're making, and retain a channel through which the creative force may flow, you will outlast the dry season. Create, create, create, and eventually an appreciative audience will find you.

I used to have a gallery. I feel your pain. I exhibited a lot of local artists. I had themed shows and foot traffic through the gallery was awesome. But getting people to buy was another story. I would cut my commission before I would ask an artist to lower their price. I exhibited my photography sometimes. A lot of people think photography should be really cheap but no one takes into consideration developing, matting, framing, etc etc.
Keep the faith and know that being creative is an essential part of life. We need people like you to keep our planet healthy, connected, and inquisitive!

Art is harder to sell than gasoline or bullets. ....peace romance and capturing still life on canvass or film or sculpture has for millenia relied upon patronage and institutions to feed an artist or preserve a gallery/studio. ...even a Van Gogh family art dealer could not break through contemporary "tastes" to reward Vincent passion for color

It is impossible to be discouraged if you know how the real world works. Disappointment, which is often followed by discouragement is a product of a lack of understanding the manner in which the real world works and unrealistic expectations of it. This is something that is all too common in the creative legions who occupy a zone of "as it should be" as opposed to the "as it is".

I'm sorry you're having a tough time. Just remember, this too shall pass. Wine a little, you'll feel better.