Although we may not like everyone, we want everyone to like and accept us. We raise our eyebrows suspiciously if someone treats us with indifference or, worse, with hostility. We feel misunderstood and rejected. And the feeling of rejection is as intense as physical pain.
It has been more than ten years since my first job interview ended with the classic: You did a great job, but we have chosen someone else. Since this memorable moment, other closed doors have followed: employers rejecting my application, people not sharing my interests, groups giving me the feeling of not being accepted.