Feeling like a horrible family memeber

TL;DR AT BOTTOM

I was born in North Carolina, but moved away when I was 2 years old. It has been 14 years, and I finally am going to be moving back where I will be about 25 minutes away from my family, however I am terrified and regretting it already.

I am pretty antisocial, and I haven't been the "new kid" since 7th grade, a year that was one of my worst ever. I had a lot of trouble finding friends because of my shy nature. Even though my immediate family will finally be able to be close to my extended family who I love dearly, I feel like at this point in my school career (junior year) it will be too late for me to make new friends and I will be making the sacrifice of being alone for a year and a half until college. In the past, I have always been the person that never lost hope that we would move back and felt like my only goal in life was to get back to NC. Now, my whole family knows that we will be moving and they are extremely excited, but I feel like I am being a shitty person for wanting to stay, even though it was me who wanted it the most originally.

TL;DR: OP wanted to move really badly, but now regrets it now that it is happening.