A girl I met at a ball gave me her ig but said she doesn't give her number to many people when I asked for it, what does it mean?

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EDIT: In this question, I am typing to ask whether this girl shows interest in me or not. Sorry if the question resulted in any misunderstandings, hope you get it clear now.
A girl I met at a ball gave me her ig but said she doesn't give her number to many people when I asked for it, what does it mean?
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