Am I a lesbian? 10 points to best answer!?

I love my best friend, and we are both females. I am completely attracted to her personality and her body. I love being with her and miss her terribly when I am not with her. We have kissed a few times, which I enjoyed, and I love hugging and holding her hand. The thing is, I can't really picture myself having sex with a female, it just does not really appeal to me. I used to think that this was just because I am so young (15) and can't really picture myself having sex with anyone. She keeps telling me that she is not a lesbian, so I don't really think that I could talk to her about this. I am not attracted to guys in a sexual way, I do notice when a guy is attractive, but don't ever think about having a relationship with them. I guess what I'm trying to ask is am I a lesbian? I am attracted to females emotionally and physically and love the idea of having a girlfriend and spending my life with a girl, but not really having sex with them I guess? Help or advice?