And also, if a person hurt you and you are the kind of person who internalizes feelings deeply, it is hard to be around them. It's difficult because the memory of the hurt comes back. Even if you've forgiven them, and might even want to restore the relationship, the hurt may still be there. Yes, INFJs may be prone to avoidant behavior because of this and the quoted explanations. They may eventually heal and be able to interact with the person who has hurt them, but it takes time.