A little insight from someone that has moved around quite a few times.... Due to my stepfathers job, I moved around a bit when I was younger... Probably every few years. I can say that it is not as hard as it seems from the outside looking in. Yes, I was definitely upset at times about losing my friends. But I ALWAYS made new friends. I never really forgot about the old ones, but the new ones always kept me okay. As a result, I have friends all over the place and have lived in quite a few places, an experience I am not sure I would trade.

***edit***
I read your other post in here and it looks like there is more going on than just the issue of moving. I never really got along with my parents, and still dont... but from what you describe, there is more. I would focus more on the other issues (or at least defining the other issues) and not so much on the actual move. Most people I know that had to deal with situations like moving were able to handle it when they were teenagers.