I had a dream of my boyfriend dying but I said my x's name what does that mean?

My boyfriend and I were driving and all of the sudden we were ping a gas station when there was an accident, I saw one of my boyfriends friend that I just met, my boyfriend went to help and when i got out of the car I found out my boyfriend was dead. I started crying hysterically in the dream and I called my mom to tell her Marlon is dead.........My boyfriends name is Phil and Marlon is my X he was my first and he ended up having a fiance and cheating on me with other girls, when I woke up I was crying hysterically WHAT DOES THIS MEAN?