Dreaming about an ex-partner, especially in the context of someone wanting to marry them, can evoke a range of emotions and thoughts. Here are some possible interpretations:

1. Feelings of Loss or Jealousy: This dream might indicate that you still have unresolved feelings for Floor. Seeing her in a situation where someone else wants to marry her could reflect feelings of jealousy or loss, suggesting that you may still be processing your past relationship.
2. Desire for Closure: If you have not fully moved on from the relationship, this dream could symbolize a desire for closure. It might be your subconscious mind's way of addressing your feelings about the end of the relationship.
3. Reflection on Relationships: The dream could also represent your thoughts about commitment and marriage. It might prompt you to reflect on what you want in a future relationship or how you view love and partnership.
4. Change and Growth: Sometimes, dreaming about an ex can signify growth. It may suggest that you are ready to move on and embrace new possibilities in your life, even if that includes seeing your ex in a new context.

Consider how you felt during the dream and upon waking. Your emotions can provide additional insight into what this dream might mean for you personally. If these feelings persist, it may be beneficial to reflect on your current emotional state and what you want moving forward.