Hello, from the informations you have mentioned it appears that your son have some personality issues. Get him to Psychiatrist for proper evaluation and also to rule out any depressive features. Also it will help him to stop cigratte and alcohol. If he does not wants to go to the Doctor then eithet you can call some Psychiatrist for home visit. Try to change the peer group of your son and also you have to cut his pocket money for some time. You can also involve some relative who have good relationship with your son and if possible than you should send your son to live with them for some time. You should freely talk with your son about his future plans, his expectations from his life and how he wants to get them.Make them realistic by giving suitable examples. You have to adopt two way relationship with your son sometime easy going as long as he behaves properly and sometime you have to adopt strict behavior if he behaves abnormally. Its always better to get help from some experts ( Psychiatrist) who could do proper counselling of him.Thanks and hope it will be helpful.