Starting Over

So my big sister has taken me under her wing after I came clean about my toxic relationship as well as dependency on Xanax, and my ex and I are no longer allowed to communicate... Although I know he is a bad person, I can't help but feel like I lost my very best friend. He probably doesn't even miss me, but I can't get him off my mind or get good sleep. No more xanax, or boyfriend, and getting two part time jobs... quite the change! All I can do is remain positive about the future... who knows what it holds for any of us! Support needed!!!! going crazy :(