While your daughter moving abroad is a challenge, it doesn't mean you've been "discarded".
The story about your son is depressingly familiar - from the child's POV.
My mother regularly complains about how much she misses us and how she doesn't see us.
She never invites us to anything, and when she's invited to something she's always "too busy".
This summer I was celebrating something - not huge, but I wanted to go out. Organised a lunch with partner, brother, and mother. Mother all very excited, can't wait, so long since I've seen you etc etc.
Four days before, she cancels. Because, and I shit you not, the landscapers are coming and she has to decide where some shrubs are going. All very important, simply impossible to rearrange or to leave to her husband to decide.
Since she remarried after dad died, she's left and never looked back. She'll complain no end about how she never sees us, but won't actually bother herself to see us.
Its sad, but to be honest I've checked out.