[Between his current 'condition', the medication that was being used to help control it, and his schedule steadily filling up, he had no clear answer to give her. How he felt varied from day to day, and he couldn't rely on much anything at the moment.]

...That depends entirely on how we get to know each other. If I do anything, it won't be 'bad'--that much I can promise you.

You're used to pranksters?