This is the thread that made me join gransnet
www.gransnet.com/forums/health/1196664-Empty-Nest-Syndrome
A couple of years ago. I realised early, like you, how bad I would feel. DS is currently at home until the end of the month, as his uni year only has two semesters, and last year was very tough. In fact every time he goes away after a long stay at home it is still tough, but it eases a little each time.
I've had to force myself to be sociable. Living where I do it would be very easy not to go out anywhere and no-one would miss me if I didn't turn up. That was quite a chilling thought, as all my oldest and best friends live many miles away. So over the past three years I have made myself go out to all sorts of clubs and often do things I really don't want to, and I have made some wonderful friends and no longer feel as bereft as I once did. I do still feel it, but it's soothed away in real life, as it is on here. I used to hate the school run - then suddenly realised I would miss all the other mums I used to chat to, none of whom live nearby as we are a very rural area.
Facebook messaging has been my saviour. That little green light that shows me when he and his sister are on/were last on is a real blessing. I never thought I would find myself silently wishing a little green blob 'goodnight!'.