I am older than you, I have more life experience and I have seen and dealt with more people than you. I use to be exactly like you when I was younger. the older I get I have started to realize how people don't care as much as I think they do. you are shy and scared to talk to people because you are scared of being judged. but trust me every body has their own struggle and they don't care about you as much as you think they do. and even if people judged you how much do you think that would affect you in the long term? it doesn't. really. as cliche as it may sound the only thing that matters is how you think about your self. work on that, work on your confidence, at the end of the day every body spend the most time thinking about them selves, not you. hope this helps.