at least on Facebook but probably in rl too, who knows everyone and who is known by everyone, who is the soul of every party and super sociable...... doesn't seem to like you or even seems to really detest you, and you haven't exchanged more than a dozen words with this person...... what is it that makes them dislike you so strongly?

This person has gone out of her way to show that she won't speak to me, say hi when we bump into each other, and freeze me out when I happen to be talking to the same group as her whilst being super chatty with everyone else. Odd isn't it?