Like "Hes not taking care of himself so he wants to appear that he is. He may not be even giving himself shots if he is making up numbers Ask him to show you when he does so you can really be accurate. I gather he does not want to be nagged even though, he deserves it. Give him an out, let him know you understand that he does not want to be accountable. Ask him to let you be fully part of his life and to help you keep accurate records so he can control the diabetes instead of it controlling him. You want him around for a very long time so how about you start afresh and make a commitment to health with each other, eating, exercising, and losing weight together?"