Hi there, I am sorry you are going through a difficult time, I have been a diabetic now for 51 years, injecting insulin. Every so often I get one of the episodes you are describing, the worst was when I was 15 when I threw my glass syringe at the wall and broke it. I didn't tell anyone for 2 days and ended up in hospital in a coma, the one and only time I have ever been admitted to hospital due to my diabetes since diagnosis. So I think it is better not to go through this alone, you have started taking the right steps by admitting to what you feel and expressing it. That takes a lot of courage.
A lot of what I would say to you has been said on here already, and I support what all have said. I had the same problems at school way back in the 60's, however things were even more different then. You had to weigh all your food as well - meat, vegetables, bread - everything, that used to get them staring when I got out my little weight scale at lunch times
. I got all the problems you talk about until I went to my headmistress and said I thought the school should be taught about diabetes.
Well that really started something - they started talks about different conditions on 1 morning per week, starting with diabetes. They brought in the Diabetic Health Visitor (as they were called then) and a paediatrician who explained the condition. Then they got 2 of us to talk about what it was like to live with it. They also did sessions on epilepsy, being in a wheelchair and asthma that I remember. These other sessions also helped me realise I wasn't the only one with a chronic condition that sometimes got me down. After that the others in the school were just curious rather than saying things behind my back.
If you know kids with other conditions, could you perhaps get together and persuade your school to do something. That way you are not singled out, and it becomes something to help many. Just an idea, however I accept this may not be the sort of thing you would like to do - which is also OK.