I went through a similar situation. I found out my STBXAH was taking Suboxone behind my back for years. He was also taking it without a prescription. He downplayed it and told me it was a pain reliever and wasn't addictive. I did a lot of research and found that it is extremely hard to get off of. He started seeing a psychiatrist that starting him on a Suboxone detox program. He put him on several other medications which my STBXAH claimed were to help with the detox from Suboxone but he went and abused those as well. I have read several accounts of people stating you can in fact get high from Suboxone. I was really blind in the beginning and just thought it was for pain relief for my ex and that it was non addictive. Now I know that he was/is addicted to it and it may have been a temporary relief in between his drug use of pain pills. Like someone else said keep a mental note of his actions and not what he tells you.