Why does my crush when I ignore him and not smile and look away from him, he will do the same, but when I talk to him and smile at him, he talk to?

why does my crush when i ignore him and not smile and look away from him, he will do the same, but when i talk to him and smile at him, he talk to me and ask me
questions, does it stop him from liking or crushing on me? and does he think im mean?
Why does my crush when I ignore him and not smile and look away from him, he will do the same, but when I talk to him and smile at him, he talk to?
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