Why does my friend always call me short?

My best friend always calls me short and comments on my size and “short legs”. She calls me tiny and small all the time and it’s the first thing she says when she sees me. She said “you look even shorter than usual.” We we’re both staring in the mirror and she says “I forgot how short you are.” She also said my new dress would look better on her because she has “longer legs” than me. Why does she always comment on my height? I’m 5’5 so not even that short and it makes me feel insecure
Why does my friend always call me short?
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