I used to be quite extroverted when I was a kid and loved the company of others, however when I hit puberty I started becoming more introverted and most of the MBTI tests I've taken show that I'm an INFP-T. Unfortunately INFP's are more prone to depression, anxiety and BDD. I'm wondering whether personality is innate or does it actually change over time with the environment dictating our personality. Perhaps the extroverted types may not be affected and bothered by their appearance as much as the introverts? Personally I'm more comfortable being by myself and introspecting. I tend to enjoy being absorbed in deep thoughts and daydreaming then actually going out and spending time with others. Unfortunately this comes at a price of overthinking, overcritical about my appearance and abilities and therefore putting myself into being emotionally unstable at times.
I really do enjoy being alone and having time to think to myself, but the few times I do get a chance to go out with close friends that or people that I've known for a long time, or I think about the past, I feel like darn, I wish I could do this more often. I don't really think anyone's truly an "introvert," I think it's human nature to feel a sense of euphoria in belonging and enjoying yourself with a group of people, if you're "introverted" you're probably just uncomfortable in the situation for some reason. Some people do have anxiety like that due to unfortunate brain chemistry compositions but sometimes I do feel like that anxiety may be well-deserved because deep down inside internally you know that you do not belong there for some reason or other (too short, too ugly, too fat, etc.) the brain is just trying to protect it's own well-being and stay within what society deems appropriate.