The problem starts when health issues appear due to drinking and you only know that lifestyle and nothing else makes you happy or occupies your time.

I think this change in your behavior came in the right time and for a good reason. It may be a bit strange and needs figuring out what to do with your free time and the new energy that comes from not being drunk every day, but trust me, there's plenty to do and you'll be thankful to your own self later, for taking this new road. Nadi needs you now, more than ever and the more time you spend with her, the better will be for you after she's gone.