leapyearnan I hope you learn to adjust, you deserve it after working so hard and giving your DDs such a brilliant start in life. I'm feeling content with my lot at the moment but know that could change, so I try find something good in every day. I used to worry if my diary for the coming weeks looked bare, but usually things crop up, and if they don't I make sure I do something enjoyable on my own. During the winter I had little project of visiting local museums and galleries. I love an afternoon at the cinema by myself, seeing a film I know no one else would want to see. Or I'll contact people if I need company (and not take it personally if they're not free!).
I'm sure retiring as a couple has its challenges, but I think it's much harder when you're on your own. You can spend days without seeing other people, so it often takes effort to have some company. Learning to be content with your own situation is the best way, but be mindful to change what you need to, or can, to reach that contentment.