Am I a because my friend is starting to really grow on me?

I am in high school, big shocker. And I am a party goer and I have made out with girls before, but recently I have acquired a friend whom I love. She is awesome, we do crazy stuff together, finish each other sentences and her best friend hates me. I catch myself thinking about her several times a day and I think she is so beautiful. We have kissed before but in a joking ind of way, and while we play truth or dare, but last week I was at her house and we did it out of the blue and we haven't brought it up again. I really think I am in love with her, or maybe I am just a naive Hor*** teenager, but who can really tell? Anyways, I am a senior, and have had lots of boyfriends, this just feels like one of the boyfriends. And recently I shun away from guys, which I just realized today and freaked myself out. So am I a or do I just admire her greatly as a friend? I am ashamed to think of her any other way than just a friend.