Thanks to everyone who replied.
Blues47, I certainly wouldn't say my goal is to die, but it's got to a point where I'm really struggling to find a positive.
Goku23, not too dissimilar from me. I used to think I could cope, and work would be enough, but it's not.
Lavendersage, volunteering is a good idea, but I just don't seem to have the time. I'll definitely look into it, but work and sleep dominate these days.

"They say that when you talk to God, it's a prayer... but when God talks to you, it's schizophrenia" (X-Files)