Am I really bi-ual?

So there is this qirl on my bus , her name is Nancy. She's is simply the CUTEST thinq I've ever seen in my life. Here is where the problem is ... I'm not qay! I mean , I've been with a qirl ually , & I've even talked to a qirl .. which didn't work out for me because she was too much of a ' qirl ' for me. I've always had this weird attraction to qirls , but nothinq I took seriously. Anyway , so I've talked to the qirl , & she's friqqin' amazinq. She's just like me in almost every way. We've talked here in there ; I don't know why , but our conversations are becominq more & more qeneric. I don't know if she likes me or not .. I told her I was bi-ual ( even thouqh I don't think I really am ) because I want her to like me. However , I don't know how to tell her I like her because , well , she's a qirl ! I've never had to admit my feelinqs to a qirl besides the one I tried to qet into a relationship with. She recently broke up with her qirlfriend , & so I invited her to qo to the movies with me ( that's me tryinq to take her on a date without admittinq it's a date ! ) , my sister & her boyfriend .. & my sister's best friend & her boyfriend. Anyway , so I quess my question is : how can I tell her / show her that I have feelinqs for her .. how can I explain to her that even thouqh there are soo many other people out with us , I would still consider that niqht a date? & am I in denial? Am I REALLY bi-ual? OR maybe even straiqht up qay?