Am i bisexual or just bicurious?

I'm female and 18, i never had a boyfriend but i really fell in love with a guy friend that i never date ,he asked me out and i sad no cause of some problems and fights we had, that destroyed our relationship and everyone goes on his way but i still think of him .anyway I've always decided that I was definitely straight, despite people continually thinking I was as I am not very feminine and all the women I look up to seem to be gay. I am definitely attracted to men and lately I've become unsure whether I am attracted to women also. I think I have feelings for girls, and fancy them but when I watch porn, unlike with guys, I don't get turned on. I do not find the idea of kissing etc with a girl bad and i seem to find myself always relate to those I know who are lesbian by chance. Saying this, I'm not sure if its that I actually am attracted to girls physically as well as emotionally or if it is just that guys my age are not so nice or mature a lot of the time and aren't paying me any attention, so I'm turning to girls. Please don't hate on this, I'm just looking for answers. Thanks