Is imitating posture/gestures a sign of attraction?

Hi...so my question is pretty straightforward. If a guy mimics your posture, your gestures, and even your way of speaking, does that mean he likes you? There's a guy I recently became friends with and he seems to hover around me alot, he imitates what I say and do very often (ex: crossing his arms, using certain catchphrases that I use, etc.) and when we talk, he sort of leans forward, or he always puts his hand on my shoulder.

Basically, does that mean he's attracted to me? I don't want to read too much into it...but he's very charming. I've started to get a bit flustered around him.
Is imitating posture/gestures a sign of attraction?
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