queensland teen was born a girl but wears a boy 's school uniform .
he has lived in misery for years and has even contemplated suicide .
a brisbane court was told ` i have the mentality of a dude '
teens must be 16 years old before they can ask for hormone jabs .
the injections are the second stage of gender changing treatment .
a child is assessed by at least five doctors before treatment is given .