Ya know, sometimes a guy just wants an orgasm without having to work at giving us one for an hour or more. Why don't you just masturbate along with him if you happen to catch him rubbing one out? I would suspect that since he doesn't always cum when making love that he gets his release from self-pleasure.
If you don't like the fact that your libidos don't match and you've talked to him about it before and nothing has changed then either get sex therapy together to learn to compromise together or both of you change altogether or leave him (don't marry someone you're not satisfied with).
BTW: If he's not interested in indulging in some sort of compromise that won't make him miserable while trying to make you happy then there is NOTHING anyone can suggest that will work. Keep that in mind (that compromise means you both need to give up something and end up with a plan that will work for the two of you)
Last edited by Wakeup; 14-03-15 at 07:05 AM.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion