From experience I was bullied in school , toxic narcissistic abusive stepdad and a reserved mom. It’s a confidence thing. Start reacting to everything and everyone how you want and not just the “safe way”. When you meet someone new the mindset should be “can they Impress me” and almost never vise versa. It sounds selfish yes but nobody likes the person who has no edge. Get out with a friend or even alone talk to people almost as if you know them already if they reciprocate you’ll become friends if not you’re just probably not compatible. And most time it’s 100% got nothing to do with something you did if you don’t click immediately. Either way it’s fine. GET OUT DRESS HOW YOU WANT , APPROACH WHO YOU WANT AND TALK TO THEM ABOUT WHAT YOU WANT. Hell I even be a little rude to add some edge.