I realised from a young age that a co-habiting relationship would be almost impossible for me to handle. Despite mostly having very tolerant and kind housemates, I found shared accommodation during my student years extremely punishing mentally. I struggle a little bit at the moment as, due to financial constraints, I find myself as a lodger in my landlady's home. Thankfully, my room is en-suite, and she is very autism-friendly due to having an autistic relative, so respects my need to minimise interactions much of the time; I find it manageable, though still not ideal.
The downside of living alone is that I rapidly descend into being a shut-in surrounded by unopened mail, bags of rubbish, piles of dirty clothes, and other detritus. Ideally, I need to live alone, but with some kind of regular, though not intensive, support to ensure that I cope with day-to-day responsibilities and self-care.
Disappearing to a cave in the mountains or a shack in the woods has been a fantasy for me ever since childhood. I have no illusions that I'd last very long, as I'm no survivalist; but should the doctors ever tell me that my time is just about up and I've nothing to lose, I might just indulge myself during the twilight of my life.
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When you are fighting an invisible monster, first throw a bucket of paint over it.