Everyone saying he's holding a grudge and should contact him for his own sanity...
Not everyone holds a grudge. It may seem callous to some, but friendships don't last forever and there is nothing saying you have to do something in the future should they have regrets. It's quite possible that there is no grudge and OP has moved on forgetting about the friend and should friend die, not feel remorse about not rekindling the friendship.
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