I’m really sorry you’re in this situation. It’s very hard to get someone to tell the truth about their addiction. My experience of methadone is that to get it on prescription you have to prove to addiction services that you’re a heroin addict. Even then you usually have to go to a chemist on a daily basis or every couple of days to get it – UK. Whether it’s methadone or heroin you need to know what’s going on. An opiate habit is very hard to live with for a partner or parent. If you’re not too far in I’d seriously think about getting out. No one sets out to be an addict but equally not many people set out to build a life with one either, and it does sound that he’s not been honest with you about this. From experience trying to have a conversation in a very non-confrontational way, showing empathy for what he might be going through is the best way to give him the confidence to open up and talk about this. But you will have to be on guard that he may just spin you a line. If he’s serious about you and getting clean he should tell you what’s going on. But how he feels about his own future may change on a daily basis if he is struggling with addiction. Good luck, keep posting, it does help.