Unhealthiness

I've seen reports of studies that show that a minimal amount of exercise improves mental health. This makes sense to me because the worst thing for my mental health is to sit around doing nothing. There's too much time for thinking. If I'm busy doing whatever, there's still time to think, but the concentration required for the thing I'm doing stops it being "too much".

I'm fairly good at being on my own. I don't get lonely. I'm much less good at being around people who are absorbed in their own activities and have no time left for me. Then I start feeling the lack of social interaction. Being "almost with" people is much more lonely than being without people.