Melannie Gregersen explains how mirroring works in flirting. When someone copies your movements, gestures, expressions, or speech patterns, it signals they're in sync with you and attracted to you.
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The next sign is that she mirrors your movements. This sounds kind of funny if you haven't been aware of it up to this point. But when we are trying to create chemistry with someone or when we're attracted to someone, without even realizing it, we can actually start mirroring their movements. So something like copying your gestures or your way of saying things or your expressions. These are ways that it just kind of reveals that It's because you're important to her and she's attracted to you. It's showing that she's in sync with you, and that's a big deal.