Eh... So many times people get so focused on putting a name to things, we forget to just be happy with who we are. So you're a girl who's more interested in acting like a guy usually would. Why does it have to be any more complicated than that? Bi-gender, transgender, gender complicated, etc. etc. Why does it matter, really?
You're obviously not the only one who deals with this kind of thing, considering the other responses in this thread. You don't need to feel weird or alone because of it. Just do what you want to do, be happy, and ignore anyone who tries to get you down about it.