I am diabetic.
I'm so sorry to hear that. My family members have high blood sugar levels as well :(
I wish I could have prevented it before it happened. Do you have any tips for how to prevent diabetes? 
yes, you can use insulin as a medication
What are the causes of diabetes?
depending on what type of diabities.the cause of type 1 diabetes is unknown
My doctor told me I have type 1 diabetes. I'm afraid of the complications that may occur down the line. What should I watch out for?
you just need to watch your blood sugar levels, exercise, eat healthy food and take your medication