What are girls trying to convey with the double glance?

steveguitar
So I was walking through a parking lot into a store and this girl who parked closer to the store was also walking to the store. She looked at mefor a bit and turned towards the store, then she turned around again and looked and me again, then turned back to the tore and walked in. While in the story she had to deal with ccustomer service while I walked around looking for something. Nothing happened, and I walked out of the store and bought nothing.

What was she doing with this second look at me, fully turning around and not saying anything then turning to her destination?

Was I supposed to turn into some super outgoing guy and say something, or become a Matthew maconohey (spelling) and act my way through to some flirting ritual? I had never seen this girl I don't think. So I really don't understandthe second turn. I wawasn't dressed in anything flashy, besides not being my style, I was wearing some cargo pants and a winter jacket... And not those funny looking puffy jackets.

So what did she want? Or rather what was she trying to do?
What are girls trying to convey with the double glance?
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