i wish i can go back in time and fix all my mistakes

because right now im not learning from them . these mistakes are getting worse . im skipping more . doing other things more . i dunno . is it the crowd im hanging out with now ? is it just one of those things a teenager goes through in life? i dont know , but what ever it is . i want to stop but for some reason its bringing me back . help me stop please ? i dont want to be an addict when i get older .