@th30wl actually more of "I'm a girl, so of course I would wear girl clothes. You don't need to go to such lengths cause you too are a girl" or something along those lines I guess
For years your friend who supported you on something like this, but has never said she feels more like a boy, and now suddenly she starts dressing like one. It's kind of obvious to assume she's only doing it for your sake and possibly at the detriment of her own school life considering how people already reacted to you. Dude's (calm your tits, I call women dude too, hell I've called a toaster dude before when I didn't know it was about to go off and it suddenly did) just trying to look out for her.