She uses the same gestures - girls do you copy a guy you like?

So when I'm talking I put up my thumbs often when communicating, only really to this girl, don't know why, I just do. Anyway, I've noticed she does it back to me now, when I dint do it to her, she will put her thumbs up to me.
Also I sing quite a lot, and sometimes when she's around, she will sing too. Not to me but maybe when talking to someone else, but it's when I can see or hear her.
Girls do you tend to do this type of stuff when you want to connect with him? If so, why?
She uses the same gestures - girls do you copy a guy you like?
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