Am I gay and how do I tell my bff I kinda like her?

I've been having dreams about my bff. Like dreams. I've never thought of myself as lez or ne thing. I've always dated gys n all. I was always the popular girl in high school school who dated the jocks. My go to the same college n we hang out a lot but, lately I've been having dreams about her n when I'm around her I find myself wanting to kiss her n thinking about how hot she is(she really is). I even think of her when I masturbate. I always thought of guys when I did that but, now I only *** when I think of her doing ual things to me. I'm scared cause I always thought I was strait and I'm scared if I tell my bff all of that stuff that it'll scare her away from being my friend. What do I do???