I almost retired when an opportunity presented itself at 58, but I wanted to go on my own terms, so stayed as I had been planning on another 3 years. Those three extra years of retirement savings, plus then taking all my saved up leave, meant another year of savings. This being added to investments meant that we can afford holidays, have been able to contribute to weddings and some smaller amounts to each adult child.
It did make me think far more seriously about retirement though. Once I'd given myself an exit date, I used that time to sort my finances, work on my heath and make a solid plan for what I would do in retirement. The plan includes some adult classes, regular coffee mornings with friends, some exercise classes and Friday drinks with another group. These things give my week some real structure.
Like you, my DH is still working and will continue to do so because he gets bored otherwise. He doesn't really have other things to fill his week with. I make sure we take regular holidays, both short and long ones, because if it was up to him, he'd happily just go to work every day forever, so it's not like I'm waiting for him to retire.
I think you have two choices now, go back to work, either part time or full time for a few years, possibly doing something completely different, or, start looking for those other things to give your week some structure. Are there hobbies you've wanted to return to, or start? Can you arrange a regular weekly catch up with some friends, are you attending exercise classes of any sort to look after your health?
I'm at the stage where I honestly wonder how I ever had time to fit work in. I miss some people and some aspects of the job, but I have 'enough' not to need to work and I've got plenty to do to keep me occupied. You need to work out which option would be better for you. There's no shame in returning to work if that's what you want to do. I've got one close friend who retired at 60 but is not 71 and she's been back working for the last 6 years full time. She had only a couple of years off before getting bored and she started off part time. She does take lots of holidays, but when she's home, she's working.