Dreams about ex-partners are surprisingly common and can signify different things depending on the context and feelings surrounding the dream. Such dreams may not necessarily mean a longing to reunite with the person but often relate to the dreamer's personal life journey.

Reflection and Self-Insight: Dreams about an ex could indicate a period of reflection and self-discovery. It might represent the dreamer's need to reassess past relationships to better understand their own patterns and behaviors in relationships.
Unresolved Feelings: Sometimes, dreaming of an ex-partner might suggest lingering emotions or unresolved issues. This doesn't always mean the emotions are romantic but could be related to guilt, regret, or anger. The dream might be urging the dreamer to confront these feelings for closure.
Sign of Personal Growth: Encountering an ex in a dream could symbolize how far the dreamer has come in terms of emotional maturity and personal growth. It may be a reminder of lessons learned and a sign of moving forward.
Symbol of Change: Ex-partners in dreams can also signify change. They might symbolize old habits or phases of life that are ending, making way for new beginnings.
Re-evaluating Current Relationships: These dreams may also prompt the dreamer to evaluate their current relationship dynamics. The dream could serve as a subconscious reminder of what you value and what you should avoid in your current or future relationships.

In conclusion, while dreaming of an ex-partner can be disconcerting, it often offers a valuable opportunity for introspection and growth. By understanding the context and emotions tied to the dream, one can glean insights into their current emotional state and make informed decisions in their waking life.