My friend keeps trying to make me feel bad about myself, why?

Why does my friend keep making the these unnecessarily comments about my appearance? She keeps pointing out that I’m shorter than her and when we sit next to each other she’ll poke at my body and comment on my “short legs.” She also keeps boasting about times when guys approached her and not me when we were out. She’s a good friend otherwise but why is she being so underhandedly rude?
My friend keeps trying to make me feel bad about myself, why?
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