hi ashes and welcome to pc! it could very well be that it's your perception being skewed as opposed to people not liking you. like ice said, feelings are not facts. and yes anxiety can play a part in this cause you already have a preconceived notion of the outcome. i'd try a little adventuring "outside the box" with people you feel safer with. see if they perceive you the way you "see" yourself. a good friend or a family member you trust to open up with first. i'm sure that everyone doesn't not like you. everybody has something in common with other people no matter who they are.
have you a therapist you can run this by with? they often can help us untangle false beliefs we have.
hope this helps you.