Write a paragraph about a decision that you made that affected writing other people. skill

I believe your question is: write a paragraph about a decision that you made that affected other people. (I'm not sure if that's what you meant or not) but here's a paragraph:

I once decided to not go to a birthday party. I was being selfish and decided not to go, even though my friend really wanted me too. She was extremely upset. I felt really bad at the end.