Letting go for high school?

Don't worry. You're not going to lose all the special qualities you have, you just have to re-prove them to your new teachers! Also, being in the special arts program should help you to make friends with others in that program. Being involved in things is very good. Remember to visit your older teachers from time to time. You will form new relationships, and as for your brother, that's unfortunately not something you can help. That is going to be hard to deal with, but you'll pull through. I promise.