I know Gypsy, it's astonishing how quickly the first year has gone and how little we have had to do once we bravely waved them off.
My 16 year old ds will also be gone in just 18 months and then dh and I will be on our own again after all those years of planning, organising, packing, washing, driving, supporting, guiding and being there, we will be free to do whatever we like.
Bliss 
What is he going to study Gypsy? My ds still not completely sure but has got some ideas.