You need to know your A1C number. The glucose and insulin numbers are snapshots at a given point in time, but the A1C number is a much more meaningful "over time" number. Below 6 is normal, 6 - 6.5 is "prediabetic," and higher than 6.5 is actual diabetes.

After hovering in prediabetic range for years, I topped out at 6.7. "Congratulations, you are now diabetic!" With an uptick in exercise, dietary improvement, and Metformin I'm down to 6.1 and holding.