She just can't take a joke.
Bloom also garnered a Special Jury Prize at the 28th Los Angeles Asian Pacific Film Festival for Best New Actress.
All she had were the self-destructive thoughts in her head to keep her company.
She then asks him to close the shutters, as she's afraid someone is watching them.
She is definitely the sort of mean girl character that, y'know, at school she knows she's pretty, she knows that boys like her, and she is going to use it to her advantage.
After either insisting he should return it, or informing him and Sam that she and Mike are now exclusive, Jessica will get the letter back and be left alone again at the station to continue waiting for Mike.