Figuring things out

I've been into women, even though I didn't know it, pretty much my whole life. I was never the girl who had posters of hot guys all over her walls, instead Christina Aguilera was more likely to be found. I finally got in touch with the fact that I am interested in women sexually and emotionally when I was about 16.
I have yet to experience meeting a woman I think is amazing (I came from a very straight laced small town), or having any kind of a relationship with a woman. I am having a hard time with the fact that something so important to me I have yet to experience, if I ever can. I am in a great relationship with an amazing man. I mean the kind of relationship one can see themselves in for a long time. He knows I am interested in woman, but we are committed. I feel so in love, but at the same time so confused, like there is this whole part of me I am going to miss out on. Me and my bf live together as well. As far as a threesome gose I know not only would it mess up what I have with my bf, but I want my first experience with a woman to be special, to be just me and her, and to be about a relationship too, not just a threesome for sexual experience.
Anyways I just needed somewhere to say all this stuff that is on my mind. Has anyone else ever found themselves in this situation, or something similar?