While we think of forgiveness as being about something we do for others, my experience is that it is something we most often need to do for ourselves. However, I do not think it a requirement in the process of personal growth. I would never tell someone that they should or shouldn't forgive anyone. Rather, I would work to help them to look more deeply at how they feel about the situation, help them to decide how they want to proceed, and then support them in that choice.