Sometimes the fantasy over shadows reality.
We often separate them into two different people. The sober ones and the addicts, they are and will always be the same person.
So when we sit and hope for the return of Dr. Jekyll we have to realize he comes along with Mr. Hyde and that will never change.
You need to look at his whole history not just the 1 year that was good. What was his history prior to that one year? How many years did he spend in addiction vs being sober.
History doesn't repeat itself - people repeat history.