Katrina's brutal rejection instantly kills all of Marcellus's hopes, making him understand her position on the break-up.
He is no longer her boyfriend, which means he can't pick her up at the entrance of the police station as he used to. Katrina is deliberately drawing a line with him. She is trying to make him understand their present relationship.
Marcellus was elated when Katrina agreed to meet with him, thinking that he still has a chance to win her back. Now he is filled with frustration and defeat once again.
But he should be happy that she agreed to meet him at all. Marcellus smiles and replies, "Okay, I'll wait for you at the coffee shop where we used to go. See you there."
"Okay, I'll come after work," Katrina replies. "I have to go, I'm a little busy right now."
After hanging up, Katrina palms her face wearily. Although she decided to break up with Marcellus, every time she talks to him, she always feels bad and gets a sense of loss.