Being alone and being lonely are definitely 2 different things.
A nickname I have for myself is The Brown Recluse. While I live with my folks, it’s a big house, so I don’t see them for most of the day- usually mealtimes (I’m the main cook, these days).
And my RW friends are mostly not keeping in touch with me anymore.
But I’m OK with that.
I used to get a little lonely in college, but I realized that was because I wasn’t getting girls like some of my buddies. Once I sorted that out into its own distinct issue, I became better adjusted to my isolationist tendencies. By the time I got to law school, going a couple of weeks without a meaningful face-to-face conversation was just fine.