Why would coworker from another dept who’s hit on me months ago wave at me while looking for a longer than normal time at me while walking by my area?

Sometimes I feel he says hi in a way that’s more nonchalant like he’s not checking for me. But today he seemed to look at me for like a whole second or something when he waved at me omggg what does it mean? YES IT MEANS SOMETHING BECAUSE IT WAS HIM LINGERING LOOKING AT MY FACE OR EYES IN PASSING ME WHEN I WAS STANDING THERE WORKING.

IT MAKES ME FEEL ALL mysterious inside like oh who’s this handsome guy staring at me hehe

Why would coworker from another dept who’s hit on me months ago wave at me while looking for a longer than normal time at me while walking by my area?
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