To dream of people or objects, which fits the definition of "former" means that not everything went without a trace. If you dream you see your ex, then your heart is still left room for him. If in your dream you along as if nothing had happened, in real life, you finally took the pain of parting. If you dream that you meet his former classmates, fellow students, colleagues, and so on, in the near future you will hear from your friend, who is now far.