I really need some girl advice i dont know what to do here.?

Ok theres this girl i like that i saw through my cousin we first saw each other while helping my cousins grandfather help clean there pool. And we had really deep eye contact the first time we saw each other. And i felt a connection that ive never felt with a girl before and ive never talked to this girl before and still havnt talked to her because im kinda a shy guy. And the next time she saw me i had no shirt on because i was swimming out to my cousins house. And we saw each other again and this time she looked me up and down and yes i have a 6 pack. And i caught her looking me up and down she looked away fast. Then less than a minute later i caught her again except this time i caught her she didnt look away she looked really deep in my eyes. And i feel in love with her yea i know it sounds stupid to alot of people but i dont care. And anyways my aunt caught us looking at each other she said shes cute isnt she i said yes very i said you can tell her that if you want to she said i will. And so she did and she never told her until i was gone. And i come back a week or so later and find out what she said about me thinking she is cute. And my aunt said she just looked at her for about a min with no expression. What does that mean? And i also dont know what to do here but i just got my first pay check from my first job and im 16 btw And i wanted to take my cousin and the girl i like to an amusement park but i dont wanna buy a relationship so what should i do here? And i left her my number was that a bad idea with a note saying i am basicly interested in getting to know you. and my number was in there to and she hasnt txted or called me yet but i dont expect her to girls i ume usally dont like making the first moves. And was that a bad idea? And do you think she has any interest in me? And what do ask her to strike a conversation up with her like i need some questions listed i can ask her to start a conversation with her. please list a few.