What does it mean to always have the same dream that your ex boyfriend gets shot?

This dream reflects the dreamer's conflicted emotions about eliminating the ex boyfriend from her life. In one sense, the ex needs to be "dead" to you, in the sense that he is no longer part of your life. The relationship is "dead." But the dream indicates that you continue to feel distress over losing him, in the sense that you would "lose" him to death. Once you are free from these emotional attachments, the dreams will stop.