Why does she mirror my actions? girls have you done this?

Anonymous
This girl works as a cashier at a place I go to a lot. she's always mirrored my behavior...like if I came in and I was quiet, straight faced and one-worded with my orders (I have been described as someone who can come off as "stoic", I am not a mean person though) she would do exactly the same things. in fact she was always like this from the start and I didn't understand why (her coworkers would talk normally to me). also I saw her be normal around other people

Well I always thought she is really pretty. so I decided it would be smart to be more talkative and smile at her more...it sure worked. I can tell she knows now that I really dig her. sometimes though the quiet thing still happens though...if I smile a little and still be kind of quiet, she will smile a little and be kind of quiet too lol. she has never surpassed me in showing friendliness, if that makes sense! seeing her talk more and smile more is awesome though and I'd really like to get to know her better and ask her out

What does it mean? do you think she likes me too?
Why does she mirror my actions? girls have you done this?
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