Hm, that's really tough. I'm not sure what he'd consider "therapeutic." What about some words of encouragement? And/or talking about positive changes he might have seen in you through your work together? Like as a reminder of the work you've done together? And I do think "nice things" could be therapeutic, like if he's listing some good qualities of yours as something for you to look at when you're feeling bad about yourself, for example.
And I'm so sorry you're dealing with this...