Going to therapy can help you create a more positive and staple self image.The more you like yourself the more you would want to share that with other people and the easier it becomes. To put a finer point on it, it kind of seems like the person I was responding to has an extreme anxiety problem. I feel bad because I’ve gone through that and I feel like I wasted a large portion of my life because I was so scared that I couldn’t live it. Nobody has to live in fear all the time

Your comments feel like projection, which lead you to make an extreme (and, in my opinion, unfounded) assumption about GP. GP says nothing about self-confidence nor 'liking' onself. One can have a social interaction like GP comically describes—and still be mostly socially 'at ease and graceful', possess a positive and stable self-image, be otherwise antisocial, and not need therapy.