What does it mean if you have a dream of your ex boyfriend being shot and you start to cty beause your afraid of losing him?

Dreams communicate in symbols, so that the people and things seen in dreams represent something different than what they appear to be. Moreover, an "ex boyfriend" is not someone the dreamer can lose - she has already gotten rid of him. So this "ex" represents something that used to be important to the dreamer that she does not want to lose entirely. The dream could be alerting the dreamer to pay attention to what she has now that is valuable.