A dream or nightmare I remember vividly

I was born into a different family. In this dream, I had a fraternal twin brother, and a little brother. I was outside, playing football with my father and two brothers while my mother just watched. My father had gotten upset with me, and my mother defended him. I began crying, I felt very sensitive. My twin brother, his name was Alex, came over to me and began hugging me. He held me and I was just crying to him, I felt unloved from my parents. I guess Alex was upset at my father for the way he acted toward me, so he got up and was going to talk to him. At this point, Alex and I were across the street from the house. When Alex got up to go speak to my father, a speeding car came by. Alex was hit, and yes he died. So the only person who helped me feel like a non-burden died. I woke up, crying. Now, in real life, I often have a feeling like I miss this brother, Alex.