He says he doesn't like me. then why he do that?

We are 15, we never talk, we were just make eye contact, but these days I ingore him...
He looks at me and I ignore him or quickly looks away, and I look at all the boys and he looks at me when I look at boys expect him.. after that he puts his hand on his cheek
(He says he doesn't like me!) then why he do that?
He says he doesn't like me. then why he do that?
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