I've read quite a few posters talk about being NC with close relatives.
Myself and one of my sisters have become estranged and have been NC for quite a while now.
She does go NC/becomes estranged from other family members for periods too, but seems to get back in contact again sooner or later. That isn't happening with us. She even declined to contact me during a sort of health crisis.
Part of it (though far from all) is that I'm the only one in the family atm with a young child and this sister in her own words "doesn't do children".
I find it sad, it bothers me sometimes .... How do you cope? What are your techniques/philosophy or whatever?