I've had the same problem, I would just stare at my art supplies wanting to make something but nothing would come to mind. Or the minute I got an idea I just wouldnt follow through, I would start but then completely loose interest. Simple thing to do is..stop. That's right, take a break, theres no point in trying to do something when you really can't get your mind into it, so just take a break and sooner or later your creativeness will return.
I did that myself, a few months ago I couldn't do anything crafty, even drawing horses had lost my interest, so I stopped this crafty stuff all together. After a few months I had found that I had gained a lot of inspiration and suddenly wanted to draw again. Right now I love editing short horsey music videos using some footage I took over the past year of horses and me riding, and I love editing horsey pictures, and Im drawing more than ever.
I also have depression, and usually at my worst times I just can't be crafty, but I find doing horse related things usually helps me, and sleep.
Sometimes I just don't feel like being crafty, so I don't try, creativity comes on its own, don't force it. Just occupy your mind with something else, for me, something else is always horses, and before you know it, you will be grabbing at those crafty things wanting to create something. :)
If I am not riding I'm thinking about horses, and if I am not thinking about horses I'm riding