Slow his orgasm down.
Yes, it's bloody annoying that he can orgasm with one hand behind his back (literally). But he's jealous of your ability to hover in the oh-good-Lord-I'm-just-about-there stage for ages. You envy his speed. He envies that you get to pause and enjoy the journey. Anything that slows him down increases his enjoyment. Anything that speeds you up increases your enjoyment. Show each other exactly what works to achieve this. Stop worrying that he'll find your requests weird. A finger inserted up your bottom at just the right moment, for instance, works wonders to tip women over the edge. Many women don't make that request simply because they're concerned their boyfriend might find it "promiscuous." Quite frankly, the majority of men would love to think you're secretly "promiscuous." So speak up!
Masturbate with him, rather than alone.
If you don't have an orgasm during intercourse, give yourself one afterward. He can watch or place his hand over yours. Masturbate more often as well: Researchers claim it increases your sexual appetite because the more sex we have, the more sex our bodies crave, even expect.
Fantasize if it helps you reach orgasm.
Many women and men use fantasy to launch themselves into orgasmic orbit; some can't achieve orgasm without it. Don't feel guilty! Hearing about your fantasies might turn him on, but if you don't want to share, what he doesn't know can't hurt him. He can't read your mind, remember?