Hi there ~
I understand your concern and it is difficult to be a diabetic for 30 years. While it might be a fine balance it might be very beneficial for you to lose weight. It is also suggested that you do so under the expert advise of a nutritionist. There are two ways to lose weight - one is to eat right and the other is to exercise. It is also necessary to modulate and titrate your insulin
according to those needs, and an endocrinologist
or your diabetologist
should be able to do so. I hope this helps.
Take care and have a lovely day!