Oh, poor Severus, I absolutely adored him here! He is so puzzled and jealous that it's really endearing to watch him struggle with his need to know what's going own, even though he really, really, doesn't want to find out.
Harry's mysterious attitude was very well played and it was the kind of behavior that would have picked Severus' curiosity, even if he hadn't been interested in Harry in the first place. I adored Harry's slytherin way of getting Sev in for their dinner date and, literally, howled with laughter while reading Vector's advice.
All in all I enjoyed the tender humor of this piece and the loving devotion with which Harry sets out to ask everyone's advice about be the best way to woo Severus. Lovely, simply lovely. But then I've learned to expect nothing less from you, Ali, and you never disappoint.