@PortMac - We have cats and they are a great comfort. I'm glad to hear you find help in your faith. I don't really have one myself.
@Nandocushion - I have done volunteering in the past, and you're right it was great. I met some very nice people, and was lucky to do something that also felt meaningful. I've actually spent a little while here thinking why I haven't done more, and what specifically I miss about it. To the first point, I've let my anxiety and inertia stop me from seeking opportunities, and the obvious local opportunities haven't sounded like something I'd want to do. The second, though, I think I most miss feeling useful in general.
@daretodenim - Thanks for the thorough answer! Some of the points really feel relevant. Eg. I think I really am quite starved for touch for various reasons. I've had massage in the past, but in a very utilitarian way to try to solve some physical problem. I'm going to think if I could try out something. (The floatation sounds weirdly scary for some reason.) And thanks for the tip about hydration, I'd not heard of that re. cortisol.
You're definitely right about depression being boring. (Also annoying. It's like having to constantly hang out with a very negative person who doesn't like anything, doesn't want anything, and will moan about everything, except it's in your own head.) I read your answer before heading out this morning, and walked a different route I usually do, and it was a nice, if small, change. I'm even in a rut with the foods I eat, so I'm going to try having something different for dinner.
Yes, of course no miracles. I think I no longer really even look at this as an illness that might or might not get cured one day (not going to argue for or against that for depression in general). It feels more like "these are the challenges and struggles that I have, for various reasons, and I need to manage and get on with them the best I can". Every little thing that helps is a plus.
@Eyesopenwideawake - Yes, plenty of therapy. I've been lucky to access it both from the NHS and privately at different times of my life.
@FionaBMCC - Thanks, and thanks for the book recommendation. The title appeals and scares my anxious side!
I really had a very low mood during a sleepless night last night, which is probably why I decided to post this morning. Right now, after being out, eating, messaging with a friend (about boring normal stuff, not mental health), and generally getting on with my day, things don't look quite as dark, for the moment. Plodding on, I suppose. Big thanks to everyone who's given me things to think on.