I sort of know how you feel although not due to the diabetes, i suffer from bad pain,m.e and fibromyalgia(aswell as other less debilitating illnesses),
my hubby never says im an hinderance or anything but i do feel that i am, i know it does get him down when i cant do things, i can feel the atmosphere change, he is my carer and at times i feel that is our relationship summed up, he says he doesnt mind my illnesses but i mind him having to do things i cant do so maybe it is my problem not his