the spotlight effect

You overestimate how much people notice how you look and act.

Most people are much more concerned about themselves than they are about you. Absent overt prejudices, people generally want to like and get along with you as it gives them validation too. It's healthy to remember that although we're the main character in the story of our own life, everyone else is center-stage in theirs too.

Instead of worrying about how you’re being judged, consider how you make others feel. They'll remember this much more, and you'll make the world a better place.

Further reading
Wikipedia