Why would a girl tell me another guy is cute?

I was walking with this girl to our bus and she was like "that guy right there, he is so cute!" and she knew I had feelings for her. She does it a lot. She is a real talkative person though. I don't know if she means to do it or if she just feels like she needs to say something and that's what she says. Does anyone have an idea.
Why would a girl tell me another guy is cute?
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