I need help URGENTLY!!

Do 你 not want to leave your old school purely because 你 don't want to leave your friends, 或者 because 你 believe your old school is academically better for 你 then the private one?
Either way, 你 must be smart to be accepted right away, and i don't think this is a chance 你 should miss. Private schools have so much 更多 to offer then public as they get 更多 funding etc, so perhaps you're dream job will become reality thanks to 你 going to this private school?
You'll make 老友记 again at this school, so i wouldn't worry about it too much, and although leaving old 老友记 behind is heart-breaking it's not forever. Even if 你 are unable to see your old school 老友记 out of school, there are still phones, letters and e-mails and even instant messenger where 你 can catch up on all the gossip, and during breaks in the school semester. summer holidays, weekends even, 你 can ask to meet up at the shopping centre 或者 a cafe and see them then.
I wouldn't worry about it too much :) People 移动 on all the time, there's nothing scary about it once 你 get used to it.

OK, One thing to remember it wont be forever. 你 will make 老友记 and its a new chapter in your life and 你 dont know until 你 try if 你 will like it. Once 你 settle in 你 will be fine. Hope that helps.

Watch this and 你 will forget about it right away :)

Hmm thats tough. Well, there is not much 你 can do apart from keep in close contact with your friends, cause thats what really makes a school, and try to make the best of your new situation instead of being miserable and working against it.