BMR is actually a lousy way to calculate your caloric requirements.
You are exceptionally lean. Relative to the average fat American, you're carrying less fat and more muscle for your BMR.
You're also 19, and still growing, and exceptionally active. All of these things conspire to require more caloric intake.
A better gauge is your lean body mass, with adjustments for activity level. But if you don't want to go through all the calculations, I'd start out by immediately moving to 2000-2400 calories/day. Keep up some cardio, but not as much as you've been doing.
Watch your waistline - the way your pants fit. If they start getting tighter, pull it back 100 calories/day for 2 weeks and observe the changes.
A well-balanced diet is subject to debate. You should be eating 5-6 meals per day of roughly equal size, so that your body stays nourished. Meals not less than 2 nor more than 4 hours apart.
Personally, I favor a macronutrient ratio of 60% calories from complex carbs (starches), 30% proteins, 10% healthy fats. You may be more or less carb-sensitive.