Dreaming about an ex can happen for several reasons related to emotional and psychological processing. Common explanations include:

• Emotional Processing: Dreams help process unresolved feelings and emotions related to the breakup, helping manage lingering pain or confusion.
• Memory Consolidation: Dreams may reflect the brain's work in consolidating memories and experiences involving the ex.
• Daily Residue: Thoughts or reminders about the ex during the day naturally influence dreams.
• Wish Fulfillment: Dreams may represent unconscious desires like closure, understanding, or reconnection.
• Stress and Anxiety: Ongoing stress or anxiety can trigger dreams about significant emotional people.
• Symbolism: Sometimes, an ex symbolizes something else in life, such as a feeling or situation currently being faced.

Overall, dreaming of an ex is a normal part of emotionally coping with past relationships, unresolved feelings, or changes in life circumstances.