What does it mean if a guy calls you “little one”?

Anonymous
So this guy is a family friend and we’ve been texting a lot. We got into a fake squabble where he was pretending to be angry and he was like “don’t take that tone with me little one”?
He’s 3 years older than me.
Does he see me as a friend, little sister or something more?
What does it mean if a guy calls you “little one”?
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