Need help knowing if a trans character (and her settings) sounds realistic.?

Question

Character her self
Okay so my character Lee is a m to f living in
Seatle and she has been aloud to dress in 'girls clothes' by her mother all her life but never really I.D. as trans till 7th grade when she was still wearing girls clothes. Her entire family is supportive and her friend Ryan is but her other friend Gavin, afraid that him liking her makes him gay (which it doesn't) trys to make her act more 'masculine' (for a girl she is though, she does three sports, swimming basketball and baseball and is a trekkie like both of her friends)
Enviorment
In her school thought the staff (except her science teacher who is more worldly about like being trans) treat as though she still I.D.'s as a boy. They make her use the male lavatory, while on a cross country road trip with the school to New York, she's forced to bunk with the boys in all the hotels.
how others see her
The girls stick up for her and treat her like them, the boys sept Gavin Ryan and Marcus (who likes her) are mean.

Answer 1

I see one little flaw,...It seems that a supportive mother and family espacially knowledgeable of a childs intent to be female, would consult and request the school to honor the childs gender choice as to protect the student from any possible injury, harrassment, and ridicule. The school would in every way possible try to keep the student body safe and segregated on road trips and this would most likely mean a sperate room on overnight trips..probabely at the students own cost.

Answer 2

Her parents should be having a fit about the personal restroom facilities the school is forcing their daughter to use.

Answer 3

It sounds plausible.