It is my understanding that the person who acted wrong did apologize. And it's been rejected. It was a serious sin and resulted in divorce if I understood what was being said. And now they are no longer best friends.
I can see why one would be bitter...but that is the responsibility now of the hurt person to deal with, not the hurter. Do you agree?
Yes I do. If the wrongdoer has asked for forgiveness then it's up to the hurting person to forgive.
Mind you that doesn't mean becoming friends again and the hurting person will need healing as part of the process.