Re: My A1C numbers
I agree with what Cora said about the glimepiride. While it's a good thing that your A1c is down, the less glimepiride you take, the better.
Back in the days when all that was available for T2's were the sulfonylureas, both my brother and I (both diagnosed in our 30's) ended up on insulin quite quickly because the sylufonylureas burned out what was left of our beta cells.
Obviously, 12 was WAY too high for an A1c, but anything at 6.5 or less is incredibly excellent for a diabetic, so perhaps the best course would be to stay on the metformin and maybe decrease the glimepiride a bit. And if you're losing weight, that will also help. Either way, I definitely wouldn't eliminate the metformin as you are most likely quite insulin resistant and if you eliminate the metformin, you'll need more glimepiride and you will end up needing insulin sooner, not later.