Are you working with a T? If not, I'd recommend taking that step. If you are, than these are certainly some chronic thoughts that you should talk about with him/her.

There are lots of simple things in life that are beautiful, enjoyable, relaxing, and melodic. Watching a sunrise or sunset; looking at a tree branch sway in a breeze; feeling a piece of Play-Do; eating a peppermint thoughtfully, not allowing yourself to simply chomp and swallow; blowing bubbles; looking at clouds in the sky; listening to birds chirping and flying into the trees; so many little beauties in our lives that we can choose to focus upon, to make it past these dark thoughts that pop into our minds. You can color, work on a puzzle or collage, draw, paint, learn to play an instrument, the list goes on and on!

Give a few of these healthy ideas a try, to get yourself out of the negative state of mind. Once the dark feelings start coming up again, focus on a simple relaxing thing again for a few minutes. Over and over. It really works!