What can or should I do?

I eat very healthily, I'm a 16 year old girl, I weigh 117 pounds and I'm 5'5". As I said, I eat very healthily but by the time Saturday night rolls around, I eat my dessert (chocolate covered macademia nuts) for the week but can't stop. Then I eat so much that I feel sick. Should I put some in a baggie instead of eating it out of the bag? Or should I add a pudding to my dessert instead of fruit everyday so I'm not depriving myself? Any suggestions would be much appreciated :)