This dream may symbolize unresolved feelings and issues with your ex-boyfriend. The act of flipping over cars could represent the need to turn things upside down and examine them from a different perspective. The fact that everyone was supposed to do this suggests a collective effort to address these issues. The lifting up of the cars could symbolize the release of emotional baggage and the desire to move on. However, your ex’s car falling off and the shattered windshield could represent the damage and hurt caused by the relationship. Your attempt to fix the car and tell your ex without him getting mad may reflect your desire to confront these issues and communicate your feelings, but also your fear of potential conflict and rejection. The fact that he is already asleep could suggest that he is not ready or willing to address these issues. This dream may be a reflection of your subconscious processing and trying to come to terms with the past relationship and its aftermath. It may also be a reminder to confront and resolve any lingering feelings or issues in order to move forward in a healthier way.