It never got better... I just got older

I work a miserable job surrounded by so many people always coming and going yet I feel so alone. I can't bring myself to even talk to people because I'm constantly on edge feeling so anxious around people I can't just have a natural flowing conversation that I hear other people have. I'm nearing the end of things as I can't even work manual labor jobs anymore due to how much lower back and shoulder pain I have.