Dreams about driving and car crashes can often symbolize feelings of control, direction in life, and the stress associated with significant changes or decisions. In your case, the new car represents a new chapter or journey in your relationship, especially since you’ve gone through a stressful process to acquire it.

The crash may reflect your anxieties about this new phase, perhaps indicating concerns about whether you both are ready for the changes ahead or fears about the relationship's stability. Seeing yourselves as ghosts can symbolize feelings of detachment or fear of losing touch with each other amidst the stress. It could also represent a part of you that feels uncertain or left behind in this transition.

Consider how you both are handling the stress in your waking life. This dream may serve as a prompt to communicate openly about your feelings or concerns regarding this new venture. Addressing any underlying worries together can help strengthen your bond and navigate this new journey more smoothly.