Growing up is hard and sometimes not what you thought it would be.
Something that I've noticed not only for myself but others close to me is that your friends do change. You say that it's never going to happen between you and your friends, that you'll never grow part, but sometimes you do. It may seem like the end of the world at that time but trust me it'll be okay.
I grew up with the same group of friends from second grade through eighth grade. Freshman year of high school, everyone started to change and their priorities became about who was going to date the football players or how popular they were. For the first time ever I felt like I didn't belong and wasn't wanted. My "friends" didn't seem like my friends anymore and I searched for a way out. My parents became concerned as my grades started to drop, my nights filled with tears, and I was no longer happy. I ended up transferring to a different school and found my home away from home. I'm not saying that transferring is the answer but it was for me. Definitely don't run away from the problem and handle it the best you can. For me, I needed a change and wanted to push myself out of my comfort zone by entering a private school. I now have a circle of friends that I can call at 3:00 AM and that they'll answer, support me and people who I can honestly say are my best friends.
"Friends are not about who you've known the longest. It's about who walked into your life, said "I'm here for you" and proved it."- Unknown
All in all, my point is that friends change but it's not the end of world. Everything happens for a reason and may it have happened so you could appreciate real friends when they come in to your life, I know I do.