Childlessness.
Please, PLEASE don't say I'm lucky really. Oh, and I have no real interest in travel 
But has anybody experienced life without children and how do you make it a happy and fulfilled one? Especially when all friends have children.
Facing this as a 'real' possibility. It scares me but I need to confront it. I wonder - how do you go forwards to a life you never thought would be yours?