Vwroom6,
It doesn't say what gender you are, but if you're female and trying to lose weight, listen to these women when they say make weights and diet your priority. Sure, you can still do cardio. I for one enjoy it, but I'm sure glad I finally listened to this same advice and prioritized weights.
Women generally have less muscle mass than men, and if they do get any muscle, they have to work a lot harder just to keep it. As you probably already know, you NEED muscle because it burns calories even just sitting there. Body fat does not. Muscle is denser than fat, so if you replace 5 pounds of fat with 5 pounds of muscle, you'll weigh the same, but your measurements will be smaller, you'll look more toned - AND now you can eat more calories w/o gaining weight.
Lets say you just do cardio and lose 10 pounds. If you're not weight training to build/maintain muscle, some of the weight lost will be fat and some will be muscle. To maintain this new weight, however, you'll have to restrict your calories even more, because now you have less muscle mass, so your metabolism is slower. This is why most traditional dieters (calorie restriction/cardio only) regain their lost weight and then some.
I see this all the time at my gym. The same ladies (and some men) day in and day out doing cardio for hours at a time. They never do weights. Their bodies never improve. Time itself is working against them. As people age, they naturally lose muscle mass (if they're not doing manual labor or any kind of weight training), and this will result in a slower metabolism which = fat gain. In the case of muscle, "use it or lose it" definitely holds true.