I know this may come off as bit far fetched but here I go.... I was recently involved with someone I know from my childhood. Everything was fine in the beginning then things drastically changed soon. I started noticing a pattern with him and his activity level. The first time I noticed something strange was when I saw him nodding off. Eventually the nods turned into a sleep like form. Of course I woke him up and confronted him. The first thing that popped into my mind was heroin or some other form of opiate addiction. He immediately yelled at me and got very angry when I assumed it was opiates. He later tried to tell me that he had sleep apnea and that's why he was nodding. I know several people with this condition and I have never seen them act like that. The nodding continued sporadically throughout the time I spent with him. A few days ago a mutual friend of ours caught wind of our short relationship and warned me that he was on drugs. I believe my assumptions are correct at this point but is it heroin? What do you guys think?