What does it mean if a guy knows you like him and acts more formal/polite to you?

Anonymous

What does it mean if a guy knows that you like him, but he acts more formal/polite towards you compared to other people? Usually, he's outgoing and jokes around with other people, but with me he doesn't really do that.

What does it mean if a guy knows you like him and acts more formal/polite to you?
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