I think im in love with one of my bestfriends and idk what to do about it, advice?

Ok, so one of my best friends Keri (we are both 16yr old girls) is really great. shes funny, smart, super cute, very upbeat personality, down to earth, and all around an awesome person. shes also what you would call extremely straight. Ive liked her for a while now but i dint know what to do about it. She is always all over me, she flirts lightly, shes always hugging me, she always wants me to have lunch with her and she tells me how much shes gonna miss me during summer even though we live 5Min's from each other. plus whenever i see her i give her a hug from behind and whisper "hi" in her ear and she just smiles really brightly and i always walk up behind her and put my hand over her eyes and she jugs knows its me so she just keeps Dion what she was doing. and today when i saw her in the hallway she came up really really close to my face just to say hi and smile. she knows that I'm gay cause all my friends joke about it and whenever she and i are together they say dumb stuff like "get some" or whistle, so I'm pretty sure she knows what shes doing. so am i looking to deep into this or does she like me and is just afraid to say something? and if she does like me what should i do about it? i really do like her and she means alto to me thanks and all advice is welcome

join the club. she could just be friendly try to take things further with her that's what I'm doing with my roommate but she has a boyfriend and it says on her face book she's straight but i could swear she's flirting with me it annoys me because she prob doesn't know what she wants and if she's bi curious or not she just doesn't know so someone has to show her. one of these days............but also one time a friend of mine just pretty much confessed to me she had feelings for me and i turned her down so to speak but she stayed good friends with me and i didn't realize i liked her or was even bi before she went out with another girl and i got jealous and that's how i realized i didn't want her to date another girl.