He looked away when I smiled at him?

Buggington93
My colleague at my new job seems to be sort of shy. He is very sweet, when we had to evacuate the building he gave me his coat because it was raining. When we are talking he looks right into my eyes for a few seconds and then looks away. He fidgets a lot and always seems to hiccup around me.

Today I had my mask off…he glanced at me and I smiled at him, he then quickly looked away. What does this mean?
He looked away when I smiled at him?
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