"You don't have to. I don't need a babysitter, either." But, he was falling into step with here anyway and Nell just shrugged.
Now that they were out of the restaurant and in the less populated halls of the hotel, however, she did smack him. Or, rather, she turned and punched his arm, not enough to cause real damage, but enough to be felt. "Would you stop that? I said you were being a jerk because you said I was just babysitting you. Not because you don't like any of this." Stopping when he did, she shook her head. "You're not hearing me, Derek. It's not about today, other than your attitude just now is symptomatic of the rest. Come on, do you seriously not understand why I'm upset with you right now?
"If it was just not appreciating any of this, you could just say 'hey, you're nuts and this isn't my thing'. But, you had to go and be insulting about it by implying it wasn't anything more than trying to keep you from shooting someone. You don't want to be affected? Fine. But, just say you want me to leave you alone. Don't tell me you're going to miss me and then spend time with me only to belittle my reasons for wanting to spend time with you. Just...say good-bye, if that's what you want to do. But, did you ever stop to think you're planning to walk on the moon while the Wright Brothers still have yet to take their first test flight?" Turning, she started to walk away again. "And, you don't know what I'd be willing to do."