Why do I have these feelings, are they like normal-ish?

Umm yea im straight. Lol thats the most inportant thing, like all my friends would describe me as a ruler. Thats how into dudes I am. And so yea I love someone right now, a dude, but im sliiightly attracted to one of my friends. Who is a chik. And like shes the type of person I hate, sorry if this insults people, but shes a really bitchy blond cheerleader,and she admits it so don get offended haha. And well, shes one of my closest friends, and all my other friends, and me, can tell shes flirting and is into me and stuff, but she says shes joking and hope she is, but I kinda dont too. Im beginning to realize…I like her, like attracted like her. I mean sometimes girls attract me, but to be honest thats only when im already really turned on lol, but im legit into her more than I shud be, and today I accidentailly tounched her boob, she diddnt notie at all, and if she did she diddnt care, but I did and I like jumped into mad turned on and I was like wtf?? So is it normal fer certin people of same sex to attrat you sometimes? Just a little? Please comment all you want.