Thanks for the extra info.
Yup, I think if your fasting glucose is over 6 then you would be told it was pre-diabetic.
The fact that it is on the low side, while eating lots of sugar in your diet, suggests you are in a great position to do something about it.
From my experience, there is a kind of apathy/expectation in GPs and practice nurses that your pre-diabetes will eventually develop into Type 2. They take the blood tests, suggest weight loss would be a good idea (gosh, I would never have thought of that for myself), here is a diet sheet stuffed with carbs, and we'll check your progression towards diabetes next year...
The reality is quite different. There are so many options nowadays that put you so much more in control. I'm 47 and I've watched (and eaten) my way through the evolution of dieting, for over 30 years. Nowadays you'll find massive support for eating less carbs and sugar - and there are nice non-sugar alternatives around that make it possible (xylitol is my fave).
Now that you are armed with a blood glucose monitor you can work out how your body reacts to food, and adjust your diet accordingly.
I read recently that by the time the average type 2 diabetic is diagnosed, they have lost half their capacity to produce insulin. Half! That means the remaining insulin producing cells have to work twice as hard, and are likely to die off even quicker. The brilliant news, for you, is that at this stage you can slow down that process, maybe even halt it.
Read up on the forum, learn from all our experience and mistakes... You never know, with a bit of diet/lifestyle change now, you may never develop diabetes!