You are hearing one side of the story, his, and, he is an addict. Addicts generally only tell half truths at best.
You have gotten him to a sober house, now let it be. He is an adult, and a married one at that. His wife may have gone thru this before and is now letting him find his own way to recovery. She is not doing for him, what he must do for himself.
I have a male friend that I have known for over 40 years, and yes, I love him, as a friend and he loves me the same way. He has been married and so have I, our love for each other is diffirent than the love we feel for a significant other, we love each other as true friends. And, saying "I love you" is just a flurry of words, it means nothing unless they are backed up by actions. My friend is there for me when I need him, and, I am there for him when he needs me, the door swings both ways.