To dream about your ex suggests that something or someone in your current life is bringing out similar feelings to the ones you felt in the relationship with your ex.
The dream may be a way of alerting you to the same or similar behavior in a current relationship. What you learned from that previous relationship may need to be applied to the present one so that you do not repeat the same mistake.
If you dreamed of getting back together with an ex, see “Reuniting.” If you dreamed about your boyfriend’s ex-girlfriend, the dream is warning you not to make the same relationship mistakes that ended their relationship.
If you dreamed about your ex’s new girlfriend, you may be comparing yourself to this person.