My friends acting freaky.Again! PLEASE tell me what you think

I know I typed a lot but please read and tell me what you think. This has been going on for a few month and only to me!! Ight we were watching Degrassi of all things and it was the episode were one dude on their came out of the closet, and she kept sayin how cute they were. then she tried to push me off the bed but I pushed her off instead, but she pulled me with her and I almost fell on her, TWICE!! That morning(o ya I spent the night,forgot to mention that) my mom called to tell me she was coming to pick me up…WE were having a get together that day…well Boo,thats what we’ll call her, started acting I don’t know flirty. She was lying length wise on her bed and I was near the end on the side, and she pulled me backwards onto her legs I just laughed and tried to sit up but she kept pulling me down, so I just sat there. Then when I started to leave I went to give her a hug but since she was lying down I bent over. We were face to face almost and she just sat there and finaly gave me a hug. She hugged me for a while and whispered bye and a soft voice and kinda gave me a sad stare.

 Another night, we were coming home from a foot ball game, and since boo and I were in band we had to go to every game. This one happened to be 2 hrs away from home so we rode back with her mom instead of the bus. She slept with her head against my shoulder and pushed her feet against mine. But Im to nice to tell her to get the fuck off but she didnt bother me anyway. And just recently someone wanted me to txt boo and ask if she was bi, I told boo that I told that someone I doubted it and stuff but they still wanted me to ask. She replied, Im not and if I was its none of their fuckin business so back the hell off, I txted her back if you were you would tel me right, she goes ya but Im not. Denile!! LOL..
Im sorry I typed so much but I want to know what you guys think before I go asking ?'s. Boo and I are very close and if she is bi or whatever I dont care. I just dont want her to feel like its a big secret and that she has to keep it from me.. She means the world to me so whatever makes her happy I'm ok with