Girls, Why would a girl complain about my behavior to everyone but me?

A girl I know, who I've been seemingly on good terms with, got angry over something I said. I've told her many times literally things like "If I ever upset you, I don't mean to, let me know" & many things like that & she always told me she would.

She got angry at me over something I said, I hear from numerous others, men and women, she complained to them, furious, from what I understand, about my behavior, and, knowing me, as I'm not combative & my response is always to figure out what's wrong & try to clear things up, to the point every single person told her the most useful solution would be to talk to me, which I'm told infuriated her more.

After this, I tried to approach her, the moment I said her name she doesn't look at me, tells me to shut up & storms off... specifically, why go through all the effort of complaining to everyone but me about my behavior, while refusing to talk to me when I so much as approach her.

Girls, Why would a girl complain about my behavior to everyone but me?
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