Guys how do you have diets and how you actually stick to it?

I was pretty recently diagnosed with crohn's diease. The doctors gave me the CDED diet on second phase. But here is the catch, I ALWAYS loved and still do the sugar, baked stuff, cookies and also oatmeal (but the sweet ones with chocolate) etc. The problem is, as you may know they are completely forbidden in stage 2 (this is my current stage). In one hand, I want to eat them, on the other they are forbidden. What do I do? Can you give me any advice? thanks in advance