What does it mean when a guy defends you about your height?

I went to a school dance and this one kid pretended to throw a ball at me. He said "Aubrey your down here" And pointed to the ground. I shrugged my shoulders. Then the guy was like "Nah she's more up to her" He then put out his arm to about his shoulder since that's how tall I am. I've also had the same incident again with the same guy. He was with his friends. They we're calling me short and small and he said I was average size.

What does it mean when a guy defends you about your height?
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