I cannot see how offering water and mints could be mean. Maybe she is feeling bit sick (hence water, dry mouth... and being bit off).

Granite, it seems you are projecting your dislike of yourself into another people. You interpret as little not important thing as "she doesn't like me". I don't think that if she wanted to be mean, she would show it with moving chairs... did you tell her that it bothers you? You need to talk about this, why do you expect others to hate you.