Matt, I am not a medical doctor but have had cause to consider the power of labels in the aviation medical process. Your country is known to be more enlightened than many others when it comes to commonsense interpretations of law and regulation but I have no idea if this extends to PPL medicals.
Given the borderline nature of your diagnosis, and fact that you are not requiring any medication, I would be going back to your specialist and exploring the possibility of another label for your condition. There must be a continuum in these things and if we were going to exclude occasional slightly odd behaviour, who among us would occupy the cockpit?
In Australia the examiner for the Class 2 medical has some small discretion in how things are reported but, from a practical rather than purist stance, I'd be doing all I could to lose the label. I'd certainly not be giving up what might be described as 'lifestyle counselling' sessions either!
If the worst came to the worst, is there any recreational flying (with reduced medical requirement) that would work for you and keep you in the air?