Pollyanna to the rescue. Or smack me in the face for being Pollyanna - seriously, it annoys me at times, but it helps get through.
Last year you could still do it and now it's more difficult, but you managed some without it all being a complete chore even though more of it was than wasn't? That's something to focus on and look up the sort of tools they have these days that help with the aches and pains and the how do I do this without feeling like my knees will pop out and run across the garden laughing at me.
If you can afford it, and I know that's a big if (I wouldn't be able to) see if there's an older chap about who's happy to do a bit of the hard work for not too much money so that you can have the joy of your garden with more of the difficult stuff taken off your back. If it becomes nothing but a chore then you've lost all the pleasure. And that's another thing. Get some help with maybe raised beds, pots, etc, all manner of small changes that bring the joy back again. I've just read properly and you have a man who can. Get him to do a bit more of the hard can for you and enjoy the buying, the having a cup of coffee and the sun on your face!
Mostly, what I do is focus on what I can still do not what's suddenly wandered off and isn't coming back. It sucks hard to lose that which was once at least easier but as long as we keep on doing the living thing it's going to happen, so appreciate what you have. I don't mean that in a "Don't complain, think yourself lucky!" at all but it's so easy for the small moments to pass without us appreciating them and I think that's what hurts us when we realise those small moments have passed. We bemoan them - of course we do - and then miss the others that are on their way through. I'm currently in a position when I'm losing quite a lot at the moment so I'm making the best of a bad hand. I "enjoyed" going to Morrison's on Sunday. Well, I say enjoyed, it was nice to be able to walk there and back and managing not to get too much shopping therefore making walking back without my granny trolley a right old pain in the hole. That probably won't last much longer but it is what it is. Today the sun was out and I got to wear my new varifocal sunglasses for the first time. I was in the car with another friend driving, in different sunnies and we had a Thelma and Louise moment although thankfully we didn't shoot a man in this winky, blow up a petrol stroke or drive off a cliff, so there was that!
Life is simple and complex and a pain and a joy. The simple and the joy can be fleeting but my lord they/it/whatever can be beautiful and at your lovely age of being a bit old(er) you have years of that ahead of you and years of growing wisdom that have brought you here. And, yeah. I think on scale I'd hit Pollyanna tonight but thank you for not doing that - you can give me an online one if it helps - and thank you for giving me the time to write something that means something to me. You'll ache tomorrow and that's fine. Epsom salts or some old lady cure (I'm going to be 60 on the 7th, so I'm not being a lairy bird calling you or me old(er)), hopefully more sun, more tea and a garden that the man who can gave a bit of a clear up for you because he loves your beautiful soul.