Why do i keep thinking about my friend?

im thirteen and im Bi. i think i have an obsession with my friend who i also think is Bi. she was the one i was talking about with the eyes in my previous question. to me she is gorgeous and just so breathtakingly beautiful. we were friends since 6th grade. and in 7th grade is when i started to feel feelings for her. feelings i never thought i would experience. love, lust, obsession and maybe other feelings i just dont know how to explain them. she would always say "i love you" or hug me but i think in a friendly way. ever since june 2 since school was over for summer, all ive wanted was to here her beautiful voice, her amazing laugh, see her smile at me (which would make me blush bright red,) here her say "Hi Val," feel her hug me again and here her say "i love u." she only kissed me once on the cheek which i cant stop seeing over and over again, it made me blush furiously. also everytime she would hug me or say those three magical words i feel like my heart was going to explode. shes in wendover right now and might move there. and i dont know whether to tell her or leave her be. but i scared if i tell her she will avoid me and not be my friend. if we were never friends again she would still make my heart stop, still make me blush, and still give me that queasy feeling that i long for. the pain is so unbearable that i cry or want to scream. i cant help myself. cause i love her deeply, but i dont think she has the same feelings for me, but i might not know. please help me decide