Sadness and Anger at Type 1 Diabetes

Hello all. I have newly started therapy for some self help and was discussing feelings towards my Type 1. I have had it for 10 years and have not ever really dealt with the anger and sadness that comes along with having a lifelong disease. It is leaching over to other areas of my life. My therapist suggest I reach out to the group to see how other people cope. How do you cope with your anger, frustration and sadness about being a diabetic? What keeps you positive?