Whats the reasoning here?

So basically my friend asked her sister what he thinks of me and she said that he's cute and than she said that if she got to know me she might date me so followed her on insta however she declined my request and I don't know why maybe my friend lied but I highly doubt that because he's a close friend I don't know maybe I should request again in the hopes that she just clicked the wrong button but I wonder whats going through her head like her thought process

Whats the reasoning here?
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