How should I deal with this?

My 3 bestfriends disclude me in everything & they are starting to not talk to me at all. They talk about me all the time & there's no one else to really hangout with during the summer...& I don't know how I should deal with it. Another thing: I'm thinking about moving to my mom's & changing schools to make new friends for a year, because I would end up going to Freshman year with my bestfriends if I moved to my mom's anyways. This gives me an oppurtunity to take a break from the drama & get new friends. But I've never been the new kid before & I'm scared. Is it scary? What should I do?!