There is hope @petuniasandpetals, please know this!
I come from a family with a history of diabetes. Maternal uncle, lifelong type 1, mother diagnosed in her forties with type 2, sister diagnosed shortly thereafter with type 2, paternal grandmother diagnosed with type two in her sixties around the same time and my dad diagnosed with type 2 a few years later than this. My partner has recently been diagnosed with type 2.
My mother never managed hers, perhaps it was a sense of denial, but she simply could not acknowledge it and it developed eventually to type 1 and then neuropathy, kidney cancer and demise over a period of about ten years in total.
My sister has managed hers somewhat, but not always effectively and is suffering serious health issues currently as a result which will be ongoing and irreversible; she wishes she had done what my paternal grandmother did at the time.
My paternal grandmother did her research and worked out how to modify her diet and mobility/exercise. She is now 88 with excellent mobility, zero neuropathy, excellent cognition.
My dad was a bit hit and miss and is now suffering massively reduced kidney function which is affecting his life significantly into his sixties.
With all of these stories behind him, my partner has changed his lifestyle a fair bit (but still loves his sweets, just moderates them appropriately now). He is close to entering what is referred to as 'remission'.
You don't say what the letter is that you have received but I can tell you, without taking some steps to halt progression at the very least, this can be like a juggernaut through your health.
There is great, sound advice out there about how to halt progress or even reverse the effects depending upon which stage you are at. Have a look at it and decide how you would like your life to look going forward. Far easier said than done to be frank, but try and shift your perspective; don't be afraid into change, be excited about how you've decided to be kinder to yourself. Very best wishes for good health.