Tell the truth: Yes! I love me some Processing!
The two of you hit it off famously, chatting into the wee hours about something you both thought no one else in the world cared about (except for maybe a few million Arduino fans). You show a few tricks to Bunsen, and Bunsen is able to show you a few things that you'd been meaning to try but just never got around to. By the end of the night, you and Bunsen have figured out the problem with the time machine (turns out, time travel isn't possible with an Arduino--at least, not just one), but more importantly, you've made a new friend. Isn't that swell?