Help

Date: 2/14/2017

This isn't exactly a dream but i need help.. Anyways, i've fallen for one of my bestfriends. i'm a girl and she's a girl and like, whenever she sleeps round we'll hold hands. i've liked her for the longest time and i want to tell her but what if she doesn't like me back and it ruins everything? sometimes we act like a couple. if you have any advice, please help