When Felicity agrees to another drink, Derek gets to his feet to go order her one, pausing because he's not really sure what she ordered in the first place, when he thinks of it. Before he can ask her, though, she's spoken again and Derek realizes he opened a door he hadn't actually been ready to walk through with anyone yet. His smile falters a little, but he recovers quickly.

"I guess if you trusted me enough to tell me that, I can trust you enough to tell you about the different way," he agrees and while he sounds confident, he isn't. He isn't confident at all. Because if he's going to tell her, he might as well tell her all of it and rip the Band-Aid off.

Maybe he should order her next coffee to go, to make her life easier... "What were you drinking?"