B.C.
When something has been a struggle and fraught with disappointment and heartbreak for a long time, it can be a relief to finally let it go.
I'm not sure there's anything he can read to help him understand how you are feeling.
Just tell him you need some time to mourn that your child bearing years are over.
How would he feel if he knew with absolute certainty that he'd done something he really enjoyed for the very last time and he'd never do it again?
It's hard for guys to empathize sometimes.
It's a rite of passage - a whole new phase - and life is full of them.
You need some time to adjust your gears.