Hi I know you asked this question a while back.
I've been diabetic from I was 2.5 years and am 21 next month. I've been though all the struggles your facing! The worst thing I did was try to be like the other kids in the sense that I stopped taking jabs and eating what I wanted. Which made me miserable.
My school was great. There was me and 2 other pupils in the school who had diabetes and we had the nurses room to go to. I got out 10 mins early from class before lunch to do my jab. The school should provide you a room to do it in which is hygienic so that you don't have to go to the toilets to inject.
Now that I'm that wee bit older I now have learnt to try and embrace my diabetes, if they don't like you for being diabetic then they aren't nice people. You may have diabetes but it shouldn't affect the friends you have! Being diabetic just makes you that wee bit more special!
My son was diagnosed on the 31st October, he is 17 months and I will be teaching him that he is just as amazing as everyone else and can do exactly what everyone else can do because diabetes doesn't rule him. You rule it!
Look into the school getting you somewhere to go tho! Keep us updated!