I think the whole "he doesn't believe in sex before marriage" thing is just a ploy to get you to sleep with him. Because then you will think "Aww how sweet" and one night when you both get drunk he says he really really likes you and that you are the "one" he wants to break his rule with and sleep with. Then when you do give in, you will feel like you are special but in reality he conned you into sleeping with him. Thus, the beauty of how manipulative an alcoholic can be.