Dating a guy that smokes weed once a day, will this lead to marriage?

He is 34 he has a great job as a sales rep for a dental supply company, however he has this weed addiction that he just cant seem to shake. He comes home after long day of work and smokes. I dont know what to make of this, I have smoked like 2x in my whole life and while i can understand the feeling, I dont make it a part of my daily life. His breath also smell very horrid whn he does puff. Should I stay with him, I mean he is cool and all but I dont want to b supporting anyones weed addiction. He says when he is around me he dont get the urge to smoke, only when he is around his friends or when he is going to a party, or chillin in his place. I dont know what to do hlp...