Need Answers

Okay so i had this friend that was my BESTFRIEND and i loved her very much so one day she started hanging when the wrong people and one day she just stopped talking to me. So im wondering if should i should try to talk to her again and maybe rekindle our friendship cause i miss her. The problem is she canged so mush and she still hanging with them bad people well im not gonna say bad but the people who think their better then everybody. So people please comment me and tell me what yall think.