Dreaming of past relationships and reliving encounters with your ex represents the good days before you settled down with a career and maybe family. It is always good remember the freedom of carefree love, exciting dinners, new exotic vacations that you had with your ex.
However, if you continue to obsess about an ex then there’s a cause for concern. For example, if you dream about your ex and feel happy or excited in the dream, it may symbolize that you have unresolved feelings of love or longing for your ex. If you dream about your ex and feel anxious or angry in the dream, it may symbolize that you have unresolved feelings of anger or resentment towards your ex.
In either case, the dream may be urging you to address and work through these unresolved feelings in order to move on and let go of the past. The dream may be a reflection of your current thoughts and feelings about your ex, and may not have any deeper symbolic meaning.