If you guys get to the point where you're having some deep discussions, maybe ask some questions like "What do you think are the foundations to a healthy marriage?" If he says love then ask about commitment, forgiveness and trust. You can also poke around a bit at what he thinks love is and how it happens. This isn't about you telling him what is right or wrong, it's about asking him what he thinks and continually peeling the onion to find out what he thinks, and maybe, get him to challenge his own beliefs.
If you go back and read thru my bootcamp thread, pay attention to how Mach1 asks me thought provoking questions. He didn't tell me the rights or wrongs, just asked me what I thought about certain things. If you assume your H and I are alike (which I know we are in a lot of ways) then this is a way you can get your H thinking about things on a deeper level. Why do you think you feel that way? Where does that type of thinking come from?