You were Ollie childhood friend. You used to date Arthur but he broke up with you because he was tired of you. He was kind of controlling and manipulating. You were devastated.

Some years later, Arthur took interest in you again and Ollie confronted him

Ollie: “You don’t like Y/n, you just liked having control over her.”

Arthur: “What if I say I want her back ?”

Ollie: “N.O., don’t you dare”

then you entered their driver’s room