Welcome Carol
I'm not sure that there are any quick solutions. However, perhaps keeping a diary of what makes it easier or harder to have your jags might help you spot patterns.
You're not the the first person to find things getting hard in teenage years, and I'm sure some who lived with T1D as teenagers will be along soon. What else is important in your life now? Friends, boyfriend / girlfriend, family, job, interests, activities, sport etc?
What support do you get from your diabetes team? Are there any education courses in your area eg DAFNE (Dose Adjustment For Normal Eating)? Many people have found DAFNE (or similar) great for both taking control of your condition and meeting others with T1D. I've never been offered one, though.
What support do you get from family and friends?