Aristocrates – Sorry I am so long in answering.
I think this is a typical looking back into your memories of your ex. Most people are often totally unaware of the experience they take in and how it interacts with them when we love or live with someone. In other words the memories and experience we gather unconsciously change us and are not lost. It is part of you and is symbolised in dreams as a person or event. See Moved on from. While you lived with them you experienced millions of memories, situations, conflict and learning experiences. So you carry them with you as memories, lessons learnt, love or anger still trying to find a way of being absorbed.
Tony