Perhaps the incident had no effect on him. I chose to drop the burden and it no longer bothered me or took my energy. Claim more simple pleasures in your life. Take time for the things that are beautiful to you. Enjoy the things that make you happy.
Most simple pleasures are free.
The only investment they require is the choice to enjoy them. Be empathetic with others when they are joyous as well as when they are in pain. It's often easier to share misery with a person than it is to share good fortune. It's okay to share another person's pain. It's equally okay to share their joy.