My XAH was a binger. He could go days and/or weeks without alcohol. But that still didn't mean he wasn't an alcoholic or that he didn't have a problem with his addiction.
In my experience, 5 days of not using did not mean that he was changed. He was simply in what I referred too as "suck up mode".
To this day, I believe that my XAH had the best of intentions most of the time when he'd say what I wanted to hear and even try to show me that he was serious. But the truth is that he didn't really work for his sobriety and he still hasn't.
Sorry if it's diappointing for you to read us all say it - but nope, 5 days is not enough to change and be cured of the addiction. He has his motives or maybe even good intentions - but it's going to take a long time for him to be a changed man.
Keep on working on your recovery!