My crush never says hi to me, even if I say it?

he's a friend's friend, I don't really know him but i've met him. I saw him the other day at my friend's house. He was lying on the couch but when I came in, he shifted his body a bit. I said hi to everyone but he didn't say anything. Is he shy or doesn't care about me at all?
My crush never says hi to me, even if I say it?
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