Can you tell me what signs this girls giving?

I new working at this warehouse and I'm working and a few times when I started she would look at me but not smile ai talk to her Friday and got to know her a bit. So this week is dragging by today she comes dress up to work in a warhpuse new shoes including now looking at me and smile and laughing whenever I say something and plus she can't really hear due to loud noise and she has ear plugs on. Explain what should I do? And what signs is she giving me