You two have been best friends since kindergarten and have been inseparable ever since

Her name is Charlotte, but you call her Lotte she is energetic and extroverted just like you and she always likes to party you both have boyfriends you also live in the same building but she lives in the same apartment as her boyfriend same with you

You called her telling her you can't go to the big party because your boyfriend wants you to stay in "seriously," she says over the phone