i feel a bit weird posting as i was only her age 4 years ago....
i went through the same thing as her although i did move out of home....
i honestly dont think she WANTS to move out or leave school but she just thinks that by saying that she is going to get exactly whats she wants....
i know this is going to sound really stupid but it is really just a teenage girl thing, and i have no idea why we do it???
some of the people i was hanging around at that age were alot older than me and i was so jelous because they were allowed to go out till whenever and do what they wanted but i was stuck at home feeling like a 10 year old.
i do understand why my mum did all that stuff now but there was no way i would have understood it when i was that age!!!

that probably doesnt make alot of sense because there is not alot of advice in there but i hop it helps a little bit????

big hugs to you!!!!!