What does it mean when a girl that you aren't dating but keep having fallouts with keeps coming back?

It's not like she just leaves and just ghosts me. Most of the time something happens whether it's something I say or do and we stop talking. Sometimes we can go as long as 1/2 a year not talking and she comes back.
What does it mean when a girl that you aren't dating but keep having fallouts with keeps coming back?
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