What does it mean when a girl jokingly says she hates you (I hope) is it flirting?

So, this girl sent me a selfie of her just now, saying "ginger abuse not on" she was wearing an orange onesie. So, I said to her it suits her XD. Don't hate me. She replied back I hate you. I replied back saying noooo don't hate me, and then was like wait, you didn't hate me to begin with?" So she replied back saying no haha
What does it mean when a girl jokingly says she hates you (I hope) is it flirting?
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