i have a close friend living with me and my partner and everyday he is getting more and more depressed and he has started to lock himself in his room and not sit with us in the evenings and has been drinking so much each week and if he isnt drinking he is smoking alot of pot im really worried becasue now we have addressed this with hima and told him that he needs to cut down and now he tell us hes not drinking but we have seen him hidding it in his room i looked underhis bed the other day and there are like 4 bottles of empty wine and 40 cans of empty beer he has also started to let go of his cleaning habbits he used to have a really clean and tidy room now there is ash all over the floor and smoks with the window shut so it smells really bad and there is sick on the floor as well and dirty cloths and just ash on everything im really worried for him and his safty is there anything i can do