Why do some pretty people turn their nose up at everyone ?

Is it maybe a defense mechanism that they have because they get hit on alot ?

Example:

I know this girl that is very attractive and I find her very unpleasant. She doesn’t smile at people.

When she meets you she kind of turns her nose up at you or although you smile at her or are a friendly to her she is cold.

I am female by the way not male.

How do some people get to be like that?

Then once I asked her if maybe she has a hard time understanding what I say as I am from a different country to her, and she just looked at me and said, no i just don’t know anything about your culture.

I find that to be really weird and rude especially as I have never done anything except to say hello to her occasionally and also my whole life most people have told me I am a very pleasant and friendly person.

Is it that she is racist or xenophobic orsomething or just has issues or some people just don’t like you for no reason?

I am not the only one she did that too. Another friend of mine told me she found her to be that way too.