Dreams about ex-partners, particularly those involving romantic gestures like a marriage proposal, can be rich in meaning. Here are some possible interpretations:

1. Unresolved Feelings: This dream may indicate that you have lingering feelings for your ex-boyfriend. The act of him kissing your hand suggests a desire for connection or reconciliation.
2. Desire for Commitment: The proposal aspect of the dream could reflect your own desires for commitment and stability in your romantic life, whether with your ex or someone new.
3. Reflection on Past Relationships: Your dream might be prompting you to reflect on your past relationship. Consider what you learned from it and how those lessons apply to your current life.
4. Symbol of Hope: If you are currently single or experiencing relationship challenges, this dream might symbolize hope for future love or the possibility of rekindling a meaningful connection.

To gain further insight, think about your current emotions and relationships. What does this dream reveal about your desires or fears? Consider how you feel about your ex and whether there's any unfinished business that needs addressing.