well you fantisize about girls..... and you had girl crushes..... well being bi doesnt just mean liking girls. its also about guys. do you? well. umm fantisizing isnt the same as feeling. and besides you have to feel something for girls. you know what you can do? try it out. if you are ttruly confused, go out with a girl and see what is it you truly feel. if its nothing then you arent bi. you are straight. thats how i found my self. i stared expiramenting with my feelings and i found who i really was.