People over analyze the situation till there is no tomorrow, women know within 5 seconds after looking at you if you will never enter their chamber of secrets if she likes what she sees it will be easy for you if not then....... Friend-zone = she doesn�t like your face end all be all.
This has nothing to do with confidence or personality, women are bombed with attention/options 24/7, facebook, smart phones and social circle they are mini celebs.
The reason why you are " friend " (LOL) with her is because you make the 1st move(text,chat) and she likes the attention.