Separation

how about just quitting? you quit alcohol, that to me is a heroic in itself, don't let vices control your life. Do not let your wife tell you what you should and shouldn't do either, you quit because you want to, not under submission to her whims, you want a better life for both of you that's why you quit.
Quit, schew gum, eat some treat, replace the urge to smoke with a healthier one. can be fast food initially than replace fast food with healthy food, than try to exercise. praying without zeal is nothing, if you can't overcome simple habits are you truly a man of god?