Maggie, dieting with guys is depressing. Whatever you do, don't compare your weight loss to his, because guys just lose it faster. It's unfair, but that's how it goes.
My husband isn't even deliberately dieting and he lost 10kg in a matter of a couple of months. All he did was cut back on chocolate; other than that he ate pretty much the same as always. And he wasn't overweight to start with: he was slim, and now he's actually passed beyond slim into skinny.
Verdict: Men are just really depressing to have around when you're trying to diet!