I have type 2 diabetes so take tablets rather than injections, so I don't have that problem, but I do have to make sure I eat a good diet, and I do find that very hard, I often really can't be bothered to prepare some food, but don't want to be hungry, so I eat crisps etc which I don't need to cook, so no you are not alone in this.
Something that I find helps me which might help you, is to make sure you have something pre-prepared that is reasonable healthy and quick to prepare and that you like to eat, to snack on if you need to. A lot of people on these forums that are following a low carb diet like macadamia nuts for this.
Also making sure you don't have haribo etc in the house might help? then to eat it you would have to go out and buy it which might put you off?
I don't know much about type 1 diabetes but I do know you really need a hba1c done asap and you need to self-test too, if you are using insulin I think?, but you know that already. Is your doctor ok, do you think they will give you a lecture about things? if your usual doctor isn't very good you could see a different one at the surgery maybe.
good luck!