Well if 'the guy I love' gives Arthur a sentimental look, then 'I wrote you a poem' gives him an expression that's basically like Crichton just got down on one knee.

"You... you wrote me a, a..."

Whoops, you might have short-circuited him.

"No," this in response to waiting, because Arthur has a hard enough time waiting for the kettle to boil and he certainly doesn't want to wait for this, and the idea that it might suck is of course too impossible to consider-- "No, I... I-I." Wow! "I would really like to hear it."