This is a hard one. For me to think someone has incorrect assumptions about me would mean I think people think about me at all. I’m pretty sure that is generally incorrect. I’m kind of an “out of sight, out of mind” person.
I guess building on that I would say that since I am introverted, fade into the background at social gatherings, and joke about becoming a hermit, people assume I am OK with the “out of sight, out of mind” thing. Until the blog, I was never really open about how lonely I am. I didn’t tell people when I needed help. I didn’t talk about how hard it was when my wife traveled for work a lot and I was alone with two kids. I’ve opted out of social events(one relatively recently) because I was in a bad place mentally.
I think, given all of that, people assume I don’t need them. Or that I don’t like them. Then they leave me alone or stop inviting me to things and assume that is what I want.