You shouldn't expect a significant other to change for you.
Anna is bothered by her partner's smoking, and he was a smoker since before they started dating.
Anna wants to convince her partner to stop smoking.
Anna expresses her concern about the health consequences but lets her partner decide what to do.
Anna starts to bring the subject of quitting regularly to her partner.
Anna's partner is receptive to the health risks and is encouraged to quit.
Anna's partner is disturbed by her nagging and it makes him smoke even more.