Garry,
It must awful for you to have this happen; as a father I can completely empathise with your hurt on this.
However Type 1 diabetes is a manageable condition and it is not something that will curtail your son if you and he get to grips with it. I've been Type 1 since I was 10 and have had a very good, fun and active life and will continue to do so all being well.
This forum is a great resource; why not read and post any questions in the Diabetes Youth Club? That is the most appropriate section for children with diabetes.
There is a huge amount to learn but it you have a methodical and practical approach to managing diabetes then nothing is insurmountable.
The main thing with Type 1 diabetes is balancing carbohydrates that are eaten with insulin taken, I have no experience of managing diabetes in children but if one of my sons were to develop it I would very strongly push for a pump; it seems anecdotally at least the easiest and best way; or I would like a very good explanation as to why one would not be appropriate.
Lastly, children are incredibly adaptable; your son will adapt and manage with your support and love. But as a parent I'm afraid the loss and sadness will probably be yours alone and not your child's; he won't know anything different - that's a double edged sword of course, but there we are.
This must be a terrible shock and a terrible worry; but this is not the end of the world it is just a new set of procedures to learn.
Your boy is going to be fine.
Best
Dillinger