Have you ever dealt with someone who actively disliked you?

So I'm having this situation for the first time, honestly I've never really dealt with it before and I find it so weird. Basically there's this woman who actively dislikes me which is fine, but what's weird is that she finds passive aggressive ways to let me know.

We barely know each other, there isn't any real reason for her to dislike me, it's not like we've had conflict. Maybe my personality just rubs her the wrong way or whatever. But how do I deal with her feeling the need to let me know? Do I ignore/avoid her? Do I keep being nice or "the bigger person" so it doesn't get worse? Can you share any times this has happened to you? I just find it socially bizarre.