What does it mean if a guy follows your eyes when you stop looking at him?

Anonymous
there was this guy we both look at each other sometimes looking away or holding the eye contact. This time we were looking at each other we were walking like on the treadmill sort of opposite both look into each other eyes felt long.. The I turned my head quickly to look at something then looked back at him he had turned his head to follow my eyes and was looking where I looked. Then we were looking again he started rubbing his face while looking then I think he smiled at me but I wasn't sure so didn't smile back. And we never talk or know each other.

What does all this mean? I don't know what age he is I'm 17 he looks maybe young but 18-20ish I heard him talk his voice isn't that deep
Updates
+1 y
hes stared at me twice too without looking away
What does it mean if a guy follows your eyes when you stop looking at him?
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