[Robert's expression wavers slightly as he listens to this; it's obvious he's not sure how to interpret this.

Finally, almost tentatively:]

... What is... 'too much'...?

... I know I have... changed here, Don. Both for you and... and for others...

But, at what point does it... erase my identity?

I have... asked myself this question before... but I cannot find a... s-satisfactory answer.