This dream may symbolize feelings of vulnerability and fear in your waking life. The presence of your boyfriend may represent a sense of security and protection, but the mugging and gun may suggest a loss of control and power. The fact that you were unaware of the gun in the car may indicate hidden or repressed emotions or thoughts that are now coming to the surface. The repeated mugging and loss of the gun may suggest a recurring issue or fear that you are unable to escape from. The final scene of your boyfriend being shot and killed may represent a fear of losing him or a fear of losing control in your relationship. Your frozen state and desire to undo what happened may reflect a feeling of helplessness and a desire to change the outcome. This dream may be a reflection of your subconscious fears and anxieties, and it may be helpful to explore these feelings and address any underlying issues in your waking life.