Don't know if you've posted before- your post sounds familiar- so I may have said this before.
I ended up as a single parent to a 6yo and a 13yo and loved every minute of it.
I moved to a house I love.
I started hobbies I'd never have been able to do with him.
I made friends and met people I'd never have known.
I joined a band and now gig most weekends.
I refound myself.
I lost weight.
I look younger now than I did then (according to my children 🤷🏻♀️)
We're all happier now than we were then.
I had a few flings but didn't get into a serious relationship until around 18 months ago.
He's now married to the OW; old beyond his years; rarely goes out: has lost touch with his friends; moans about EVERYTHING; overweight, balding, in poor health and boring.
He has a lot more money than me but I know which of us is happy 😉