Why would a outgoing guy get quiet around a shy girl?

There is this really popular guy in my school and he like is always looking at my friend. Trying to get her attention. I really don't trust him around her because she is really shy/innocent. Although, I always see him by her. Looking down at his phone like she does sometimes. He always has girls round him ,why... show more There is this really popular guy in my school and he like is always looking at my friend. Trying to get her attention. I really don't trust him around her because she is really shy/innocent. Although, I always see him by her. Looking down at his phone like she does sometimes. He always has girls round him ,why her??
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