she is your ex girlfriend

The middle school you and her are dating than few weeks later she break up with you and you are now her ex

You are and her now the same high school, you are the smart student in the school

At school

You are walk in the hallway while reading a book suddenly she bump into you than you fall down on the floor

"Lily" she didn't notice you yet I'm sorry..I don't see you...she noticed you oh..is you..she say with cold tone