I've always spend most of my (free) time alone. I live alone, I exercise alone, I sleep alone, I eat alone and I go out (cinema, etc.) alone.
But I never really felt lonely. Well, at least my social anxiety and discomfort was always bigger than my felt need for social interactions.
Until I limited my time on "social" media (mostly Reddit and Discord), stopped playing multiplayer games and quit my parasocial interactions (podcasts mostly).
And ouch... I guess I'm lonelier than I always wanted to admit (to myself).
I now look forward to working in project groups. I always dreaded those and they're still a little bit a pain in the neck to be honest, but I feel much better on these days.
Without constantly listening to music or a podcast, I also find myself small talking with other people all the time. Don't worry, just a short conversation within a clear context. I'm not like this at a real life bus stop! I promise!
But this wasn't why I hit the reply button. I've been looking around for offline (boardgame) clubs, events from community centers and volunteering opportunities. I haven't joined anything yet, but maybe this is also something you might be interested in. I think at of the day, text-based communication is a poor substitute for the messy and sometimes unconformable offline interactions with people.
Or we could just try our luck and join #13304's cult.