Guess what, being primal won't save you from heartache. (yeah, I know you know) Illness can beset even the healthiest of us. My father was strong and fit... then severe pancreatitis (caused as a rare side effect from an ERCP scoping procedure) killed him in three weeks.
Things were strained a bit this past year, but I always figured we'd have a good talk... but we never did. I am devastated.
So... do your sprints, move a lot, take your fish oil... or whatever... but put "mending/keeping/prioritizing relationships" at the top of your list.