Your BMI (Body Mass Index) which is a measure of body fatness based on your height and weight is 20.3 you calculate it by dividing your weight (kg) by your height (cm) squared. A healthy BMI is between 20 and 25, so you are already at a healthy weight.
You are also still growing which means that you will keep increasing in weight as your body grows bigger. Thats ok, it just means your bones are growing in density and you are increasing your muscle mass. All good!
I would not restrict your diet so much as this will stop your body from having all the important tools it needs to grow healthy muscles and bones.
I would just concentrate on the exercise. Try doing some resistance or strength building exercises that work your muscles as well as your running. This will help build your metabolism and keep your muscles toned and your bones strong!
I know its hard but try not concentrate on the scales so much, they fluctuate too often with different things. Just work on creating healthy eating and exercise habits that will last you for the rest of your life.