This is so many wonderful things - where do I start? First, it's the perfect halting back and forth dance when you want desperately to throw yourself on someone but haven't quite worked up the nerve or the impetus. Second, lovely boys and pitch perfect characters! Third, it's better than a travel essay on Cambridge! (can't wait to go sometime next week!) Last, I love the little, mundane magical details, especially the one about when a portkey jams. Brilliant, that! Also, the lines that had me giggling:

Parks really shouldn’t be allowed in the middle of fog-prone cities.
and
“You get out of bed on the wrong side so often that there’s actually a dent in the wall.”