I would also echo what everyone else has said about validation coming from within you.
Although reading your story was sad and you didn’t get the ending you would have like, I was relieved when reading it that you chose the ending that you did or a new beginning whichever way you look at it.
The alternative, possibly looking at another 20 years of the same …….. doesn’t bear thinking about.
If any validation is required read back on your post from time to time as a stark reminder to how life could have continued, there is no greater validation than the words you have written which so clearly capture what you have been through and if you hadn’t been so brave as to walk away – the life you would be still leading now.
It is hard to explain to others and many people don’t get it , I hope they never find themselves in the position where they have to find out.