What your doctor is telling you is that you have diabetes and need to control your food intake to keep your blood glucose within normal ranges. Calling yourself a “borderline diabetic” would be like a woman calling herself “borderline pregnant“. Either your body can handle eating as much carbohydrate as you do or you can’t.
Your eating habits, weight, and blood tests should be reviewed by a registered dietitian for specific carbohydrate and calorie recommendations. In the meantime, you should also plan to eat three meals per day and possibly two light snacks during the day to spread out your calorie intake. Eat 2 to 4 carbohydrate choices at a meal. Each carbohydrate choice should have 15 grams of carbohydrate. Limit alcohol and fats until you see a dietitian.