You should attend events you are invited to.
Greg has been playing a great video game all day when he realizes his friend Bill's birthday party is coming up that evening.
Greg wants to enjoy his night.
Greg stops playing video games and goes to attend Bill's birthday party.
Greg decides to continue playing video games and skip the birthday party.
Bill is happy to see Greg, and they both have a great time.
Bill is hurt that Greg didn't come and their relationship is damaged.