Everyday could be our last. This is really sad, not just for the one who died but for the family and friends too. And to have had regrets, that is probably one of the worse things. After I lost my favourite grandma and aunty, I try to remind myself everyday to live my life without regrets - if I feel like losing my temper, I try to calm myself down first so that I do not regret my choice of words or actions. If I feel like calling them to say hi, I would just call them. No regrets if possible.
What you say is so true; remorse or regret can take all the joy out of a life. Therefore, just like you, we should all learn to control our temper. Especially with the people we love. Thanks for sharing your experience, have a great weekend!