I meant he wouldn't have needed to say he was clean to LuLu; he wouldn't have given it up at all if there wasn't some reason he wanted to give it up? I don't think he "changed his mind" about it; like cigarette smokers he got back in the habit from being around others who smoke/the opportunity. He probably has to give up those friends in order to give up smoking again and I doubt he's willing to do that. If they're not known to LuLu, if she isn't "included" in that group, why should she want to let that continue? That's a change in the relationship he has chosen (to be with them instead of with her).

He's "addicted" in that he can't be with those people and not smoke, because they're smoking. Many people who do have an alcohol problem can't be around alcohol without drinking. If you have to drink 1 glass of wine every night, can't not drink that glass of wine, that's a habit, possibly an addiction. But, only people who have a problem with others drinking are even going to notice how many/if another person is drinking whereas everyone is going to notice another smoking (cigarettes or marijuana) and quite a few are going to have a problem with that. No one has to go off with "others" and exclude their former intimates to drink a glass of wine with their dinner.