Is it flirting if a guy gives you a nickname & gives you a nickname to call him?

This guy I work with knows I have a crush on him. But won’t pursue because he says I’m not his type but insists I call him Big Daddy Cam. And today he nicknamed me A. Coop Nasty ( my name begins with an A and my last name is Cooper lol)
Is it flirting if a guy gives you a nickname & gives you a nickname to call him?
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