It means exactly what it does.
Look anyone can say in the moment they don’t want to use, but that doesn’t mean that in the next moment they will be able to think of anything but how, when, where they can get a fix…
And yes you will drive yourself insane always worried about if he is or isn’t using….trying to figure out his why’s, what he is thinking, what he says means, what his actions mean. And it isn’t a healthy way to live. So if you are going to hang around, then you need to make sure your are putting yourself first, get some education on enabling, on codependency, and get yourself a strong support system. You can not watch without having your own support system and without working on just you. Find acceptance, because even if he isn’t an addict and I don’t think the label matters, using isn’t healthy, jail isn’t a good sign, you fixating on his behavior and his why’s isn’t healthy.