You need to take a step back
@Denisea, and regardless of your job, consider that you are more important than it.
If you don't look after yourself properly, you will be of little use to your employer, and most understand that.
So, instead of just getting on with work, get on with staying alive and healthy.
As I'm not on the website, I can't tell what your insulin regime is, but if you are using MDI (two insulins) then missing meals shouldn't really be an issue. Missing insulin before a meal isn't such a good idea.
Ultimately though, your approach feels a little as though you've really been in denial over the past three years and you're starting to realise that you can't do that anymore, which is a good thing.
As I've already said, you need to make the decision to be in control and manage this yourself. Ultimately, you are the only person who can!