Oh, and let me add something: I think that the song is sung towards the man, who used to be Mia's boyfriend, and a woman, who used to be one of Mia's friends, and Mia's boyfriend cheated on Mia with Mia's friend. I think the line "Have fun with prickface 'cause you sure fucking blew it with me" implicates Mia's friend as the second person: she blew her friendship with Mia because of the affair.
Oh, and let me add something: I think that the song is sung towards the man, who used to be Mia's boyfriend, and a woman, who used to be one of Mia's friends, and Mia's boyfriend cheated on Mia with Mia's friend. I think the line "Have fun with prickface 'cause you sure fucking blew it with me" implicates Mia's friend as the second person: she blew her friendship with Mia because of the affair.