Of course your pain matters. Other people just don't want to talk about death and certain deaths are harder to relate to. My sister died a month and a half ago, no one seems to think it should matter. When my mom died, 11 months ago, people who had had a parent die were more understanding. Few people I know have had a sibling die. It is a strange place to be when there is a struggling spouse, two sad children, and a father grieving for my sister-our place seems lost. Remembering and writing about the childhood memories may help. I plan to write them and share them with my sister's children. I already sent them pictures. God bless you.