I was amazed by your post, because they almost exactly mirror my sentiments. This site may be of use: http://en.Wikipedia.Org/wiki/transgender

gender identity is completely separate from sexual orientation, so it is perfectly normal to have a sexual preference for women, yet identify more with being female, or vice versa. It is similar for me, except I am bisexual, although my preference is for women. I exhibit similar behaviour to you, e.G. Singing female parts, wishing to dress in female clothes. I always had a split male/female identity, yet I always preferred the female, and often fantasised (and still do) that I was a beautiful girl/woman. My body language is naturally feminine, although I normally restrain it to be neutral - I dislike the general essence of masculinity and find it shameful to express, and that I was far more built for feminine qualities, such as caring, tenderness, thinking in an emotional context, and helping with others. While it is possible for a male to do this also, you may, like me, still identify much more with women. For example, if I see a woman I find attractive/charismatic, I will often imitate her mannerisms (be they feminine or not) but I will almost never do this with a man. When I was young, I wanted to have the look of somebody like celine dion or mariah carey. However, I also have masculine traits, which results in the "split" personality. To me, it seems as if you are similar - you are not quite a "woman trapped in a man's body" but you are somewhere in between that and simply being curious about being a woman and cross-dressing.