I too have a family I never see. My advice from personal experience is to get on with your own life and look after your health. Don't do anything that might cause you stress.
I have tried very hard to have a good relationship but its not to be. My son is happy. I have told him I love him and care about him and his family. I know he read the message on Whatsapp.
You get used to it until you don't think about it very often. Sad, but life doesn't always work out how we eould like it to.
Please concentrate on yourself. Best wishes for the op.
De-cluttering, the never-ending process
Am I An Intolerant Victoria Meldrew?
This is what failure looks like
Ugandan MPs pass bill imposing death penalty for homosexuality