Why is guy so observant?

Lynn1989
Hi a guy I know is very observant toward me he said today are you ok is everything ok with u? I said yeah why he goes u seem bipolar as your really smiling or very down but am not its just as I don't smile all time, why say that?

Also he saying what do I do to work out now not at Zumba, he says he perfect in his body now but acting bit strange to me like teasing me in weird way and smirks then kinda flirts in front of e its weird?
Why is guy so observant?
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