Why is my male coworker suddenly trying to talk to me?

Out of nowhere, he’s busting my chops and going out of his way to make me laugh by acting silly. I’ve never really thought he’d acknowledge me, but after me asking for something he was preparing, a switch flipped. He lingers around my dept all the sudden and almost everytime he passes by, he has to talk to me or tries to be silly to make me laugh. I caught him looking at me from the corner of my eye and looked away when I looked at him. I’m not sure how to approach it or if I should. Thoughts?

Why is my male coworker suddenly trying to talk to me?
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