Is it normal that i am sexually attracted to my bestie?

I'm bisexual and my best friend is straight. I love her so much and I could imagine being with her forever. However I also have sexual feelings toward her. I find her extremely attractive and I masturbate to thoughts of her. When we sleep over at each others houses we cuddle in bed. She is much taller and stronger than me. She is always big spoon. Sometimes she will lean in and nuzzle my neck. She'll ask me questions too and it sends shivers down my spine. My breath catches in my throat and she laughs. She is a huge tease and she admits to it. These moments turn me on the most. Also she'll sometimes grab my wrist and pin me on my stomach while we cuddle. She is in wrestling so she would always practice her moves on me which also turns me on. We both consider and call myself her bitch. She knows dominance turns me on too. We both consider her a dom and me a sub. She also always mentions how she'd be great at foreplay and I agree. I just wish it was with me. However she would never date me because she completely against dating your close friends. She doesn't want to ruin the friendship. Also she spent a few days thinking she wasn't straight and even told a few friends that she liked me. After those few days though she said that she was pretty sure she was straight and it was just hormones.