If you want a label, see how "demi-boy" feels! The term is used for someone whose identity leans more heavily on the male side, but isn't quite all the way there.
Or perhaps you're simply a transgender man! It's perfectly acceptable to not want to transition, and would not make your identity any less valid. There are a lot of transgender people who make the decision not to transition for an array of reasons, and that doesn't make them any less of the gender they identify with!
Hope this helped a little!