>There are the usual suggestions: go to the dog park more often, pick something and build it, read books, hop on dating sites, find a hobby, and so on. But I'm finding it hard to actually do any of that. I would blame depression, but I have a great psychiatrist who has me on antidepressants, anti-anxiety meds, and mood stabilizers.

At any rate, spending most of your time alone when you're the kind of person who needs to be around people to remain sane is going to give you depression, regardless of what substances you're taking.

Also -- it's cliched but that's because it works -- are any of your hobbies physical? Exercise works better than antidepressants, and depression can be reliably predicted by tracking the user's GPS coordinates (and detecting a reduction in physical movement).