It's a formula for life.
Whatever the issue or difficulty, be the witness. Observe it. Don't get overly involved in it. Things change on their own, with or without your input. But there is great value in observing, being curious about, asking questions, and the like.
No matter what, be kind. That's what we always regret. Letting our circumstances affect our relationships. You can usually take the 2 or 3 seconds to be kind and courteous to others, even when you don't want to. With this especially, it's a matter of choice.
Can an apple will itself to fall off the tree? No. But we can think and we try to go faster than nature's pace, creating only stress and suffering for ourselves and others. So let the rest go. What is unresolved will resolve itself, in duee time.
In the meantime, again, be kind. Most of all, to yourself.