Why does he stare at me sometimes?

I don’t think he’s actually looking at me but there are sometimes when he does stare at me when I’m not looking but when I look at him he doesn’t look at me anymore
when I first noticed him looking at me he looked away slowly and looked at me again a few seconds later
I just think he’s just looking around but what do you guys think?
Why does he stare at me sometimes?
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