There are a lot of people who have a mental illness and diabetes, i have suffered from different mental health issues for over 20 years now and i too got diabetes at a very young age. The thing is you are told to avoid stress as it effects BS but people have stress from being a diabetic. Have you not tried/ been offered a insulin pump as it is more easy to keep better control of diabetes and you have one needle every three days and you can eat when you want as that is the only time you need to put insulin in to combat what food you have. There is always insulin going in and when you learn about the pump you can have a different background insulin every hour if needed and if you are not hungry then you still have the background insulin going in. The thing is no matter how you feel you are connected to the pump so you no its there but you can take it off for bathing, the only down side is that a first you do have to check your BS more regular till you get the dose right but the positives are more than the negatives.