You're probably under the umbrella of "genderqueer"

Genderqueer - Wikipedia, the free encyclopedia

I think you also fall under trans*. I don't think you necessarily need to feel body dysphoria because you mentally feel and picture yourself as a girl. Everyone has different levels of dysphoria and yours happens to touch on how you express yourself through your mind. If you switch between the male and female persona you could be considered "bigender"

Bigender - Wikipedia, the free encyclopedia

Bigender is still considered a subset of transgender/genderqueer.