The counselor who helped me through my darkest times with depression in the past once said to me, "It's simple: when you repress, you depress," and it's certainly true of me. It may not seem like it, given my preference for keeping a cheerful exterior, but I was in a pretty bleak spot for a while.
However, that's passed now, and I feel like myself again. There are many various reasons for this, but the number one reason is all of my various internet pals who have gone out of their way to cheer me up, and I'd really like to thank you all. In particular, mammallamadevil, paradisacorbasi, @Boursin, everybody who participated in this thread, and especially my beloved laurie_robey.
You are all awesome. :) And I'm very grateful. :)