Congrats on the decision to recommit to your goals. You seem to be having a tough time with your journey. I'd like to make a suggestion which will ultimately help with the diabetes and any other health issues you and your family may suffer from. Read one or all of the following books: The Paleo Diet by Loren Cordain, The Paleo Solution by Robb Wolf, and The Primal Blueprint by Mark Sisson. They are all amazing people and have great advice on thriving with a paleo/primal diet. My father has had great success with this diet by losing excess weight and "curing" his arthritis and psoriasis.
Good Luck and Welcome!