a quick sideways eye flick in your direction can mean a lot of things, some good, some neutral, some negative.
But, in all cases, it shows you’re a salient piece of information for a moment and probably judged and classified quickly, even if unconsciously.
So, that’s a start.
Who glances your way unprompted and what can you do with that information?
(I don’t have an answer for you, just a question for thought)