i used to have painful social anxiety. i did not talk to absolutely anyone besides my immediate family (that i lived with). the way i got over it was exposing myself to extremely uncomfortable situations. i started out online, taking every chance on socializing with anyone, whether it be responding to reddit posts, using video games text chat, etc. eventually i wasn't so scared of talking to people online, so i started talking to people that lived in my country/nearby in hopes to get comfortable enough to meet up with them. my first meetup was horrible yet it was the best decision i've ever made. i kept going out and most of the times i'd still be extremely shy and not talk a lot. after a long time of forcing myself to being with other people i was no longer anxious. i'm still working on my social skills from not talking to anyone before, but my anxiety is gone. i think you should try to expose yourself to socializing even if it's way out of your comfort zone. i think that's the only way out. hope you feel better soon, you can do it!