What do u think of my book idea??? *?

Im 13 & heres the plot a young girl who is a princess of a magical kingdom but she dosint know coz when she was a baby her parents got killed by her evil aunt who wanted 2 be queen & her grandmother took the girl & put her to a strict catholick school to keep her safe owned by the grandmothers old friend even tho the girl is protestant but theres a forest at the back of the school & the girl could always see faries & stuff then when she was older about 12 the faires dissapeard & she forgot all about it then when she was about 15 came back and the faires told her the needed her help coz the evil queen is gonna destroy the kingdom & the take her 2 the magical kingdom where she meets her grandmother & her sister she never met & the explain it all 2 her & she meets a cute boy but her family & his family were enimies & she meets a girl who soon becomes her bff & the evil aunt also have a duaghter&son who are evil aswell & the girl the cute boy & the bff set out 2 stop the evil aunt :what do u all think?? Thats just the plot i mean it s better in my head i just need 2 write it! So whats all your apinons please no hurtfull comments