KenM, problem with Diabetes is it's not as simple as it will flat out kill you, there are a range of unpleasant things that can happen on the way, gangrene, blindness, impotence. Any of those happening will make you feel worse, and I'm sure you don't want to end up in even more of a downward spiral.
Can you not find some middle ground, say try either dietary modifications or some kind of sport, golf maybe or bowling that you can find bearable? Unfortunate as it is, medication and management of your weight and fitness are the only options, there really is nothing else yet, and even the experimental stem cell treatments are more likely to be trialled on otherwise healthier subjects.
No-one does everything perfectly. My friends husband is insulin dependent diabetic, even though he cycles a lot and stays on top of his injections (btw, he has one of those compressed air devices, so he's not having to actually stick a needle in himself, have they offered you that?) but, he drinks too much alcohol in binges and causes a lot of worry with that.
You've been getting very prescriptive "do this, do that advice" I realise if you are depressed that's not the most appropriate. So I won't do that, but here's one tip, with food, I MAKE myself eat the veg first, get it out of the way. That way the nicer part of the meal is a reward- worth a try?
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Other people are people too.