Petty girl behavior to other girls?

I work with girl and she’s cool with me for the most part I think but then she seems like she doesn’t like me and is rude other times. For example we got free breakfast and I made a comment and said one of the sauces were hot and she immediately quipped “Well I like it.” Umm, didn’t say I didn’t like or dislike was just making a statement. Why do girls do this?

Petty girl behavior to other girls?
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