This girl said she likes me as a friend but she smiles at me,winks at me,and askes me personal questions?

I asked her for her email she gave it to me but her number she said no my number is more personal to me.She asked me if i drive or have a car i said no i take a buss .She asked me what is my last name.She asked how old am i.I answered 19.She is just one year older then me.She said you are to young for me and i like older guys.She still smiles and winks at me.Is she playing hard ti get?I realy dont care about her that much i just like her a litle i just want to know why is she doing that.