"I tried to read books about how to overcome social anxiety, and other books on how to connect with people and make friends, but nothing worked."

You were on the right track! I'm impressed. Truly. You are talking about making major changes in your life...just because it hasn't worked out yet does not mean that it can't or won't.

You are on PC opening up and asking and sharing and wondering. These are the actions of an intelligent, strong, and brave person! A person who can live a happier life. I believe in you. The question is how can we help you to believe in yourself?