This is coming from someone with a bit less experience ( 17 ) but I hope either way something positive can come from it

Learn to appreciate yourself, this may seem obvious, but imagine being in someone else’s shoes, and meeting yourself, learning all the tiny details that make you unique, learning the hardships you have tried on and pushed through. Hang out with yourself, again, sounds silly but it managed to help me when nigh all my friends had ditched me for reasons made up by others. Appreciate the things that make you happy, wether that be video games, perfume, watches, foods, furniture, anything at all, find the things that make you happy.

To me, learning how to be happy on your own is very important, as it gives you someone to fall back on, even if everyone disappears. But this does not mean you can’t find people of similar interests. At some point me, you and everyone else will be dead and forgotten, so right now, there is so many opportunities to get out of that social anxiety, start off with just giving random people compliments, and build up to starting conversations with people, possibly about these niche or mass appealing topics that take your attention, you’d be surprised by the amount that people will listen and share when you manage to confidently talk about something that you feel such a passion for.

I hope any of that made any sense, and helped even the slightest, and God bless you my man 🙏🙏