Are you tracking what you eat? I notice you said you eat some sugar, for example. That's a big red flag to me not about how much you're eating but about how many calories.
Honest truth: If you're not losing, you're almost certainly eating too many calories. May not be eating too mu*****uantity, but eating the wrong sorts of foods can be an issue as well. It's amazing how easy it is to slip back into bad eating habits. That's why I still track my food even now that I'm at goal.
If you can give us a better idea what you are eating, being truly honest with yourself, we are more likely to be able to help you.
Highest weight: 335 lbs, BMI 50.9
Pre-op weight: 319 lbs, BMI 48.5
Current range: 140-144, BMI 21.3 - 22
175+ lbs lost, maintaining since February 2012