[DDv]

First, if You don't mind, please tell us Your height, weight and age.

Second, if You want to lose weight the best way is to do sports and eat 'correctly'. You don't really need to go on a diet. Just eat so much that it'll satisfy Your hunger. Most people tend to eat more than this. A little change in Your diet could be useful too, like the abovementioned vegetables, no sweets etc.

And running isn't necessary. You can do any other sport, it doesn't matter when You want to lose weight, altough running has other benefits too.