I relate a lot to your comment. I don't talk much to people I don't know or don't feel comfortable with. I've always struggled to feel part of groups in school, as I just enjoy being quiet and by my own. It's not because we don't have anything to say, but because we just like having space and talking when we want to (at least in my case).
I started being more myself after graduating from college, though. Even at the work office, I would do my own thing without caring much about what other people think. If people can't respect who you are, that's their problem, not yours. The ones that respect your personality, are the people that truly matters. I've been working remotely for 3 years and it helps a lot with it.

Liking being alone is a good thing. It make us more reflective and conscious :) Thank you for sharing your story!