When you meet someone you like in the street, you want to be alone with her.
You were killed by a car. The car accident here symbolizes some uncontrollable changes and setbacks in your life.
Maybe you are worried that you can't grasp the opportunity of love and will be adversely affected by external changes.
As for the dead female classmate calling you, it reflects that you can't forget the unpleasant memories.
Some problems have been bothering your heart, making you unable to accept new feelings.
Don't be superstitious and unlucky.
It's just a manifestation of mental state.