'' Why is my friend copies me all the time or is it just a coincidence??

OK im a sterteotype picker person looking for individualities.I have a friend who's very nice to me because im a very shy person.She always give me good advice.I like her very much for being nice to me.For example when i go Goth she go wear Goth clothes also.But she never told me she's copying me.Why is that??And she barely talk to me when she find new individuality.Thank you!! PEACE!!