I am so tempted to stop taking insulin for a while
Please, please, never consider this.
You might reach your goal, losing some weight, but it's a very dangerous eating disorder. The high blood glucose might result in complications. What use is being thin when you lose your sight, or need dialysis, or lose a leg?
If you want to reduce the amount of insulin you use to help weight loss, you could reduce the carbs you eat. Less carbs = less insulin, assuming you dose according to insulin to carbs ratios.
If you're on fixed doses, DO NOT reduce your carbs, you'll need to learn to adjust your doses first or you'll end up with dangerously low blood glucose!
Have you asked your diabetes nurse if you can get an appointment with a dietician to help you find out how you can adjust your diet?