Hi Meg,
You know how we talk about addiction being that big elephant in the living room that everyone pretends doesn't exist? Well, my husband's recovery became that elephant! Once I started detaching, I didn't know how to be encouraging without meddling. So, I stopped saying anything, especially once he commented that he appreciated me not asking him about his recovery all the time.
But a cool thing happened. He got to the point where he started openly talking about it with me. In his case I didn't get the feeling he really wanted much input from me. I think it was his way of sharing. So I still don't say much of anything. I do think some people need more cheering and encouragement than others, but like I said, I find it hard to do without adding my $.02 in....