This patient support community is for questions related to juvenile diabetes including celiac disease, depression, diabetic complications, hyperglycemia / diabetic keto-acidosis, hypoglycemia, islet cell transplantation, nutritional issues, parenting a diabetic child, pregnancy, pump therapy, school issues, and teens with diabetes.
When you visit the JDRF website, look for the link to the Online Diabetes Support Team (ODST). There's you'll be able to connect more personally with folks in your area who have gone thru (or are going thru) similar situations. As GG pointed out, the folks there are very supportive & knowledgeable.
Good luck. Your son is lucky to have you in his life. With the chaos that two alcoholic parents can bring to a child, it's not surprising that this fellow lacks the confidence or competence to face life's challenges and to enjoy it. With help & support, like what you're offering, he has chance to be and to feel better.