Dreams involving catastrophic events like explosions or nuclear threats often reflect deep-seated anxieties or fears. In your dream, the comet transforming into a nuke could symbolize something unexpected and alarming that you feel is threatening your sense of security or stability.

The presence of your ex-girlfriend suggests that you might have unresolved feelings or concerns about her well-being, which is further emphasized by your frantic attempts to warn her. This could indicate a fear of loss or a sense of helplessness regarding relationships from your past.

Crying in the dream signifies a release of emotions. It may point to feelings of grief, regret, or sadness that you’re processing, either related to your ex-girlfriend or perhaps to other areas of your life.

Your friends advising you to leave for safety might represent your subconscious desire for support and guidance during uncertain times. It could be a reminder that you are not alone in facing your fears and that there are people who care about you.

Consider reflecting on your current emotional state and whether there are unresolved issues or feelings you need to address. It might also be helpful to talk to someone you trust about these emotions to gain clarity and support.