If a girl keeps saying I'm annoying, why would she get upset when I don't talk to her?

Anonymous
She keeps saying that I'm annoying and that I'm me and that's why she doesn't talk to me. Then when I see her again and she says hi or wants to talk and I have a more quiet and serious disposition, she gets mad at me (even more so if I talk with other girls and not her). So am I annoying or not? What does she want?
If a girl keeps saying I'm annoying, why would she get upset when I don't talk to her?
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