Actually, just an update on this:
I don't know what I was thinking at the time I wrote this thread, but I wasn't nearly as sad or depressed as I thought I was. But I do get quite sad when I have a migraine.
I really only get into a mood like the one I described in my first post when I'm sick with a migraine. Getting one of those makes me way more sensitive to light and sound, so I tend to try to stay alone during those and sort of sleep through them.The rest of the time, I feel fine.
Anyway, I've been really happy with everything my rather nice life has thrown at me, and I think I have this life going very nicely.
Yeah, thanks for all the helpful insight on this, and I've got it handled for now.
I am homosexual. A lesbian, actually. If you have a problem with that, then it sucks for you. It's not your problem. It's not even a problem. I quite like it this way.