Find a reason to quit. Let me share to you the lovestory of my friend. She has an asthma but she fall in love with the guy who is addicted to smoke. The guy also fall for my friend and try courting my friend. Now to break the gap between them, the boy instantly stopped smoking just to prove the love for her. Up to now, they are still together.
I totally agree! It ain't rocket science, therefore, just do it. And for whatever reason that you say not to stop or quit, it's really only a matter of perspective regarding what's really more important in one's life at a certain point in time.