Q is absolutely completely not nervous in the least.
Except that he totally and honestly is, because it's his first real date in nearly five years and it's Valentine's day to boot. So he's out of his cardigan and put on a tie that's not knitted and ironed his best waistcoat and he's ready to go.
Well mostly ready to go, he's fussing with his hair in the mirror because it refuses to do anything close to behaving. He sighs and supposes it's too late to do anything about it, grabs his jacket and the box of cinnamon hearts, and answers the door.
-- to a face full of flowers. "Oh!" he laughs, delighted. "Hello. These are lovely. Let me put them in some water."