Unbiological sister
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Your best friend in the [whole entire] world!!!! You love each other [like a sister]. You guys have like the same exact personality and have so many inside jokes! Your just like twins. You think the same things, do the same things and love the same things! No one can replace them and everyone knows that you guys are best friends! (Unbiological sisters)! They are your only [chickadee]!
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