Please don't bring in the stupid "gender identity" drivel here, neither side speak any sense anyways.
He likes cute things and share alot of interests with the girls, he also said "I'd like to be seen as a guy, rather than a girl" in the first chapter he got introduced. (In the usual cute clothing and all.)
Just let him be himself rather than try stick those labels to him.
Gender doesn't dictate how you act or what you like so it's just silly when someone try categorize people by "that's how girls act", "that's how guys act" or saying stuff like "maybe you're a girl inside" just because they didn't fit those stupid fabricated notions. Gender does however have an influence although weak, and like with any other kind of influence it's perfectly normal if you're not affected.
(Most notable with newborn infants since they have clear patterns on what they reflexively try focus their sight on, becomes less and less notable as time goes since those reflexes don't remain for long and they'll definitely acquire experiences and get exposed to all kinds of influences, many of far greater magnitude to boot.)
BOTTOM LINE:
People are who they are, if you want to know what someone's like then watch and interact with them properly rather than just assuming things based on some labels like genders/genderidentities and so on.