Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. You are guessing right. Marijuana is a drug which has the potency to alter the consciousness of people. Cannabis, commonly known as marijuana. Cannabis is often consumed for its psychoactive and physiological effects, which can include heightened mood or euphoria, relaxation, and an increase in appetite. Unwanted side-effects can sometimes include a decrease in short-term memory, dry mouth, impaired motor skills, reddening of the eyes and feelings of paranoia or anxiety. You must get him out of this habit. Please post a direct question to me in this website. Make sure that you include every minute details possible. I shall prescribe some psychotherapy techniques which should help you cure your condition further. Hope this answers your query. Available for further clarifications. Good luck.