Best friend puts me down subtly and I’m scared to talk to her about it?

My friend keeps shading my appearance out of the blue when we see eachother. I know it’s shade because I always feel bad or embarrassed. Every time I see her I come away imagining or rehearsing how I’ll confront her about it, but when I actually get to hang out with her I chicken out and end up not confronting her. I guess I’m scared our friendship will change if I confront her about it. Are we really best friends if I can’t talk to her about this?
Best friend puts me down subtly and I’m scared to talk to her about it?
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