A slightly different point of view from me - I was diagnosed with type 1 diabetes as a 30 year old woman, about 16 years ago, which meant my recent Marine Biology degree became virtually useless, any hope of working in Antarctica gone, couldn't rejoin TA (had resigned to try to emigrate to Australia or NZ, where I was diagnosed at a SCUBA diving medical) etc. I didn't have a relationship then, and quite honestly, I couldn't have coped with one - employment, driving etc was all more than enough to deal with.
However, within 3 years of diagnosis, I had completed an MSc, got some work for a scientific research organisation, and met my partner - and we're still together

He kept coming into computer room where I was data entering - I thought it was the attraction of an air conditioned room, the only one in that part of the building and it was a hot summer. He asled if I'd like to go canoeing, was very impressed when he realised I was a compentent paddler and had built my own fibreglass kayak many years earlier.
Very early on in our relationship, I told him that if I ever said "I need to eat", I really mean that I urgenlty need carbohydrate, preferably sugar, whereas "I'm hungry" means just that - no urgency. It has worked well fro us, even in some very odd situations eg trekking in South America, Atlas Mountains, ski touring in Norway, kayaking Caledonian Canal etc. Not sure if you and your girlfriend like that sort of thing?