Ive been struggling with some addictions and bad habbits?

I have the opportunity to move to Pennsylvania with my father and his family and get away from my friends and these bad habits such as smoking drinking and all these harmful stuff and possibly even do a lot better in school. I am just unsure if leaving my old life behind for 6 months is really worth it and i am kind of scared to have to adjust to new friends, but i know staying here is only going to become my demise between getting high all day and not doing any of my school work. What should i honestly do.