Shy Girls, Is Waving A Sign Of Interest Or Awkwardness?

Three weeks ago I ran into this shy girl that I know. We Know each other from a friend and she's beautiful but incredibly shy. When we passed each other she was already looking at me. When I noticed her looking at me I started staring at her and then she waved at me.

P.s: I am a little shy myself so when I would run into her at prior occasions I would end up staring at her so I'm guessing she waved out of awkwardness,
Shy Girls, Is Waving A Sign Of Interest Or Awkwardness?
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