In 'Pulp Fiction', Bruce Willis' character is mainly involved in the underworld - related plots. We don't really see a 'girlfriend' aspect directly related to his character in the movie. So, the answer is no, at least not in an obvious way within the movie's narrative.
I don't recall exactly who Bruce Willis' girlfriend was in Pulp Fiction. It's been a while since I saw the movie. You might want to check some reliable movie review sites or forums for the answer.
In Pulp Fiction, Bruce Willis' character didn't have a significant girlfriend. The story wasn't centered around that kind of romantic relationship for him.
In Pulp Fiction, Bruce Willis' character didn't have a clearly defined girlfriend. The plot was more focused on other elements rather than his romantic relationships.
Fabienne, Bruce Willis' character's girlfriend in 'Pulp Fiction', was a supporting character. She added a touch of normalcy and love to Butch's life in the violent world of the movie.