Hi Rosa,
Your diet maybe a bit unconventional, especially for a type-1 diabetic!! None of us are perfect, we all do things we know we shouldn't, mine is enjoying wine too much. You know you can't continue on this diet forever, even for a "normal" non-diabetic person it's not great, although no-one, not even the "experts" can say for definate how that will affect every person.
I was skinny till i was diagnosed, I have struggled with my weight(though not obsessed) since diagnosis at 19, 22 yrs ago. Your experience shows how very different we all are, and you are luckier than most, that your diabetes is not ruling your life. However when you feel you need to change things, and i'm sure you're body will give you a nudge- then i have no doubt you will.
You're obviously doing something right, so give us some tips, cause I'm soooo jealous!
Jus x