Those people who are dependent on substances or activities which are negative for their health need assistance whether they wish to be honest or not. Most people who are hooked on unsafe substances or activities mainly associate themselves with other individuals who have those same problems, that will make it hard to attempt to advise these people in a helpful way.
What you can do would be to confide in someone, who is not an addict, concerning the approaching decisions you must make. You can tell your parents, a close buddy or even a minister and make them listen to your story. Somehow, with other people’s support, they will assist you to the right direction. Also you must find a reason to quit, as most addicts just drift through life with no regard for anything more.