Hey Matt, i'm glad you KNOW you can raise this issue here and feel the love from the Org for you.
I've lost many, many family members over the years some very close some very distant but they were always in another country so my experience of loss is nothing compared to yours.
All i can say is they is a big old Spidey man-hug waiting for you next time i see you dude.
And you're right about sometimes just needing to air these things and i'm sure your cus is up there smiling with the knowledge that he may be gone from your life but he'll never be forgotten.