What to do when even photos don't lighten my mood?

It's a rough spot being in when something you're passionate about won't lighten your demeanor. It's horrid really. Photography is my passion and being angry and with no inspiration is a big problem.

I see these images in my mind when I wake up or doze off during the day. But when I go to shoot them, argh, so many road blocks. Not enough models, too shy to do this, not the right equiptment or setting. Why must these things be so complicated for such a simple shot? Why must people be so insecure with themselves?

-sigh- It's really a travesty.