I told my guy friend that I found his best friend cute, and he left me on seen, why did he do this?

For context I said that I hoped that his best friend was going to be at a meet up we're going to do next weekend. he kept asking me why and I just said that I thought he was cute, but he left left me on read, why?
I told my guy friend that I found his best friend cute, and he left me on seen, why did he do this?
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