I don't think anybody can walk through what an addict has walked through and come out the same person they were before they became lost in addiction. Just as I don't think anybody can walk through what an addict's partner has walked through and return to being the same person they were before the experience.
Alcoholism changes people. It changes those who love them, too. It will never be the same as it was before. Just as yesterday and tomorrow will never be the same as today.