Of course, but if you're eating potato chips and bacon for breakfast, fried chicken and pizza for lunch with coke, instant noodles with a cheese cake at night, then you aren't going to be losing weight. My point is that with a balanced diet, reducing the proportions of what is consumed will be beneficial to weight loss, and is more effective than just cardiovascular exercises or resistance training. It's not necessary to count the calories to achieve a deficit in caloric intake, but each item that goes into your mouth is a potential energy source you have to burn via running- but you only have so much vitality before you collapse.

So I rank, in order of importance, eating less (but nutritious, less carbohydrates, maybe you can check out some vitamins to supplement your diet?) > resistance training (building more muscles allows you to burn more energy) > cardiovascular activity (pure running) in order of effectiveness in losing weight. Optimally, you could combine all three to achieve maximum results in the shortest time.

That is my opinion.