Can only offer my experience, but there was nothing my wife could have done or said to get me to quit drinking. Maybe if she threatened to leave and take the kids I would have quit, but not sure how long that would have lasted. I would have looked for a way around it.
As most have already said, she has to want it for herself. That's the only way it will stick.
As for you, you need to do what is best for you. You can not love her enough to force her to quit.