This dream may reflect feelings of conflict and danger in your waking life. The store represents a place of commerce and exchange, suggesting that the argument may be related to material or financial matters. The presence of your boyfriend may symbolize support and protection, but also a sense of partnership and shared responsibility. The gun may represent a desire for power and control, or a fear of being overpowered by others. The fact that your boyfriend shoots and seemingly kills the other man may suggest a desire to defend yourself and your relationship, but also a potential for violence and aggression. The death of the other man may symbolize the end of this conflict, but also the consequences of using force to resolve it. The final scene of your boyfriend being shot and killed may represent a sense of loss and grief, as well as a reminder of the potential dangers of confrontation. Overall, this dream may be a reflection of your inner conflicts and fears, and a reminder to find healthier ways to resolve conflicts in your waking life.