Dreaming of an ex-partner, especially in a happy and romantic context, can be quite common and may symbolize several things. Here are some interpretations:

1. Nostalgia: You might be reminiscing about the good times you shared. The dream could reflect a longing for those moments or feelings of happiness that you associate with that person.
2. Unresolved Feelings: If you still have lingering feelings or unresolved issues related to the relationship, dreaming of your ex can be a way for your subconscious to process those emotions.
3. Desire for Connection: This dream might represent a desire for intimacy or connection in your current life. It could highlight a need for romance or affection that you feel is missing.
4. Personal Growth: Reflecting on an old relationship can also indicate personal growth. You may be evaluating how far you've come since that relationship and how it has shaped who you are today.
5. Symbol of Past Relationships: Your ex may symbolize something broader, such as your past experiences in relationships, lessons learned, or patterns you want to avoid in the future.

Consider how you felt during the dream and upon waking, as those emotions can provide additional insights. If you find yourself frequently dreaming of this ex, it might be helpful to reflect on your current emotional state and what you truly seek in your relationships now.