What does it mean if a girl makes goofy faces at me when she sees me?

Anonymous
There's this woman at work who's normally really quite. she's 34, and I'm 29. We had a hour long conversation 2 months ago and she was like a open book, we hit it off really well. Now whenever I see her she makes this goofy face like turning her head to the side and making a stuck up face but then always turns back to me and smiles a big smile. She also always touches my arm when we are near each other. I've noticed she tends to only act like this when its just her and I around.
What does it mean if a girl makes goofy faces at me when she sees me?
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