Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. Very much heartening to hear that your friend do not wish to go backk to meth habit. But a word of caution. He is actually suffering fromm substance abuse related hallucination. Now the hallucination has become obsessive. That means development of paranoid type of schizophrenia is possible. Consult a psychiatrist / psychologist for proper diagnosis and treatment. Do not delay. Timely diagnosis makes cure easier. If you still need my help, please describe the whole problem in detail and post a direct question to me. I shall definitely help you with psychotherapy techniques to over come your problems. Hope this answers your query. Available for further clarifications. Good luck.