Lots of people still think that introverts hate social interactions, or feel better without any social interactions at all, but we do need to be social. Some people get dogs or cats and that helps them a lot. But lots of introverted people will tend to find some way to mask the loneliness by distracting themselves that requires a lot of attention, or occupying themselves with something that emulates social interaction. Playing a game while watching twitch streams of that game can fill both of those roles, listening to the streamer and reading chat periodically. That can work in a pinch, but it's not a real solution. And I don't have a real solution, aside from "find your balance", but I know that's not helpful.

I can suggest something that I found to be a more effective distraction, though. And it even could lead to the first steps to a solution to introvert loneliness if you're lucky. You can try going to a local bar/pub on a slow day. It helps if you drink alcohol, but you really don't have to. And of course if there's a history of alcoholism in your family, you should definitely avoid the alcohol. Make sure to sit at the bar, because a lot of bartenders will start up conversation with lone patrons in their down-time, and the same goes for drunk people getting up to buy another drink, so you don't have to initiate if you don't want to. You can end up having a few interesting conversations in a night (or sometimes none at all), and go home either feeling good about going out on your own free will (I.E. Not being forced into a social situation), or exhausted from any overbearing social interactions and therefore a bit more content with going back to spending time by yourself for a while.

This helped me before I made a couple of friends (who I met at the pub) while living alone in a new city, after my distractions got stale. I say it's worth a try, but everyone is different.

It was hard to initiate that first trip to the bar though, it felt very, very weird. But halfway through my second beer, I felt mostly content with even just listening passively to background conversation. By the time I ordered the 3rd, the bartender had initiated conversation, and before I knew it that feeling of loneliness was gone. It's important to keep moderation in mind though, I could see that being very effective in catalysing a drinking problem. I did this 2-3 times per month, and that was just enough for me.

So ymmv, but it helped me a lot.