NCd as this is quite personal.
I got a phone call out of the blue last Wednesday evening that my paternal granddad had died. It was my last living relative on that side of the family. I have told my step-sister (not related to GF, but we grew up together), my mum, and my DH, and literally none of them have given me any support at all, and DM even asked why I was bothering to go to the funeral. I'm randomly crying all over the place (I cried in the hairdressers yesterday) and no one will even talk to me. I'm trying to keep it together looking after the babies and going to work but my mind is all over the place.
Do you really have to be directly affected by a death to give someone support over it?