Colloquial Indonesian has two pronouns for addressing friends of a similar age or younger persons, namely "kamu" and "elu" (or its variants, "lu," "elo," and "lo"). This article examines variation in the use of these terms by two pairs of teenagers involved in romantic relationships. Based on data from contemporary fictional narratives, it suggests that both terms can signal distance and unfamiliarity as well as closeness and intimacy. The article shows that term shifts correlate with changes in the relationships, as marked by conflicts or intimacy. It argues that the shifts reflect the individuals' continual assessment and re-assessment of their position within the relationships. It also suggests that the shifts indicate the individuals' understanding of the differences in the terms' expressive values, as well as their personal intent and social orientations. Address choice is thus dynamic in that shifts parallel changes in an individual's relationship with an interlocutor. (Contains 2 endnotes.)