I have the same problem. After marriage, *I* was the one that changed (for the better) so I feel like I have no right to push my SO to change with me, even if the smoke is repulsive. I am still madly in love, but the lust lights are low. Leaving isn't really an option - I think that would be shallow of me - but I don't have any easy answers either. My SO has good intentions, just zero conviction. It's too hard to eat well and too time consuming to go to the gym... or something.