Recovery is a life-long journey and you can lose sight of the destination any time and get tempted to use the substance you swore you'd never touch again. This weakness serves to remind you that the war never is over. Learning from this will force you to avoid situations or anything else that might act as the the trigger which [might] draw you back to the addiction. View not a cravings as a weakness. Use them instead to strengthen your resolve to burn your bridges behind you. Accepting that you are weak makes you fight harder to win.