I would suggest tracking your food (and drinks) intake. It will begin to show you why you may not be losing weight, or gaining it, in your case. Do I recall you saying you use an iPad, or other tablet? myfitnesspal is available as an app (free) , and once you have been using it a few days, it takes moments to keep it up to date, on a daily basis. By truthfully entering your foods, the app records them, but also adds in the carb and calorie details for each item. (You do need to sense check the data, as some of it is added by users who may be guessing.). When you have a few days data, it will probably become clear where changes need to happen, if you are serious about improving your general health, and diabetes in particular. As
@Mazzer suggests, it is also available on the PC, and smart phones.
I'm not suggesting you adopt the Newcastle Diet, unless you honestly felt it was right for you and you could get support from your GP, but Professor Taylor's web pages give great information on how the diet works, and alternative ways of achieving similar results - even "just" reducing calories. I say just reducing calories, as opposed to meal replacement shakes, which patently aren't for everyone. Personally, I thought this brief paper here provides a great summary, including the recommendations for on-going eating, after weight loss:
http://www.ncl.ac.uk/magres/research/diabetes/documents/Diabetes-Reversaloftype2study.pdf
That the paper suggests that after losing weight it is important to long term eat around 2/3rd of the amount you used to eat.
The site I've taken that paper from is here:
http://www.ncl.ac.uk/magres/research/diabetes/reversal.htm