Do you mean alone as in “engaged in solitary activities and not interacting with anyone” or alone as in “sole occupant of a defined exclusive space (house, apartment, room, office, cell)”?
I’m at home most of the time, and busy with my own things (like everyone else), but almost never the only one here. It’s a rare occasion, like maybe one hour a month, when I have the place to myself. For someone who used to live alone by choice for years, sometimes that’s hard.