Well, I haven't found the words, precisely, but I have found a word.
Weary, adjective: Having one's interest, forbearance, or indulgence worn out.
I am weary. My forbearance with life is worn out. The constant stress, the mundane melodrama, and the ever present, lurking thoughts of "I've messed up again" are wearing me down. I want out.
It's hard to explain. I've yet to find the words to explain. But this one word, it's a start.