am i becoming depressed?

I'm 15 and i have moved around 6 times in the past. About almost every one to two years. From school to school;house to house. I keep getting new friends but i keep losing them!!! OVER AND OVER AGAIN! I keep losing pieces of myself im about to move again at the end of the school year again after i got all my friends all over again! I keep losing the people i love i have no control over the decision of moving. I'm feeling more and more depressed and getting more and more anxious every day i think about it. I don't know what to do. I keep losing a bit of myself every time i leave. Now its going to happen all over again what do i do!!?!?!?The stress keeps building the more i think about it!