Society seems to disapprove of liking to be alone. What else can we expect, it's a society, so of course it does. But if you really want me to teach you how to do this terrible thing:

View it as an opportunity. You don't have to fix the blinds or cook, and you don't have tell anybody about it. There is nobody to maintain an image for. You can be really gross, or incredibly lazy, nobody will notice. (This is perhaps the real meaning of Sartre's phrase "hell is other people".)

Drop the pitiful attitude. Instead of whining "Who will comfort me?" you must experiment with saying "Yes! Everybody has finally fucked off!".

For a while it will seem as if you need other people to give life depth and meaning, but this is an illusion. You are habituated to leaching meaning off them, is all. Now you have to find your own sources. "Solitary confinement with internet" sound like the most ideal prison to me: would you really want to be surrounded by other prisoners, with their noise and drama?

This is adaptation, and thus will take time, because of ingrained habits, expectations, and habits not yet arrived at. The process unfortunately is slow and stupid and you'll have to sit it out, perhaps in front of a games console.

Get better games, until you find one you can immerse yourself in for a month, with enthusiasm. Don't skimp in hunting for games.

Listen to the silence. That is, listen to the distant ambient sounds. This should be soothing meditation, and if you do it long enough you'll get the peculiarly naughty and sensual feeling of sitting quietly. Think of it as a free John Cage concert. Silence is golden, right? It's something rare. Social people are continually destroying it for one another, so they miss out.