Cat diagnosed with diabetes today. Could use some words of wisdom from fellow cat owners.

As title says, one of our cats was diagnosed with diabetes today. We go back on monday to learn everything we need to, like how much insulin to give, how to do it, what his new diet needs to look like, and so on.

Honestly, I am just wanting some reassurance that this isn't a death sentence. That this doesn't mean his life is going to be over in a year. That cats with diabetes can live for years after being diagnosed.

I know it might sound stupid to some, but I am scared about that more than anything. I just want to know, from people who are dealing with or have dealt with the same thing, that cats can in fact live long lives with diabetes.

Sorry, this is all new to me.