There maybe still some lingering feelings btwn you and your ex. Did you and him have a sexual relationship? Usually if sex has taken place in a relationship, it creates a spiritual connection btwn two people. Do you mind if I ask how your and his relationship ended?
May I ask the details in the dreams where he is present? Details help a lot, as he maybe representing certain aspects in your life. He can also be symbolic of a higher authority since he was your boss.
With this relationship you were in with him, he will most likely not be contacting you. He was so quick to get angry and get rid of you because of the guilt or other emotions he was feeling. Sounds as though he used you temporarily for his emotional release regarding the relationship with his child's mother. Sorry that you had to experience this sort of treatment. People are quick to use and abuse other's for their own personal gain.