It is important to make a distinction between close friends and people you don't know. Also, being alone may feel good but it is not a lasting solution as ultimately humans evolved as social creatures, and you can't rationalize that away.
Try spending e.g. a weekend or a week with close friends or family (if you have a good relationship with them), and see what it does for your anxiety.
> However, the two things must be mingled and varied, solitude and joining a crowd: the one will make us long for people and the other for ourselves, and each will be a remedy for the other; solitude will cure our distaste for a crowd, and a crowd will cure our boredom with solitude. (Seneca)
Yes but my main point is that it's very easy to get stuck in a local optimum without ever realizing that there can be a significant social component to one's anxiety issues that can be easily explored.
Try spending e.g. a weekend or a week with close friends or family (if you have a good relationship with them), and see what it does for your anxiety.