What does my guy friend mean when he called me ‘silly’ ?

Anonymous
one of my guy friends put on his instagram story, “slide up to be friends”, i slided up to be funny with, “🙋‍♀️🙋‍♀️”, then he says, “we are friends silly”. so i’ve never been called silly by friends before, and i was just wondering if it’s simple or not I don't know.
What does my guy friend mean when he called me ‘silly’ ?
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