Joking Insults, Talking or Flirting?

So, me and this girl I like are always jokingly insulting each other. Sometimes it goes a little too far, but that is besides the point.Girls, is this flirting, or just how you talk with friends? Does it matter at all, does it mean she doesn't like me? by the way I never really see her acting this way around anyone else,
Joking Insults, Talking or Flirting?
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