I've been on a low carb diet for 5 years now. The key I found to "sucker for sweets" desire is you take one day a week off. I find sugar is like salt now... if you give it up for a while and go back it's really really sweet and after a day of enjoying sugar I'm ready to stop eating it again for 6 days. If you haven't tried the one day a week off I recommend it next time you do your 3 months.