Is it me or them?

So I work at a kiosk inside a mall every day I work I’m minding my business I look up and the girls in a makeup store are looking at me I smiled at them I’ve even had conversation with a few but now they won’t speak to me all they do is stare. I’m not a person who enjoys people just looking at me, now I started to just look back at them. When I say the just look at me ive seen 1 come to there door way and look at me. They seem to have a attitude with me I’m confused cause I’ve never done anything to them I even told them when some people where stealing a bunch of their makeup.

Sorry I don’t know where to post this