In this article I reflect on research relationships in a qualitative longitudinal (QL) project from a relational perspective, understanding agency as interdependent and evolving. My reflections are based on a study involving repeated interviews over eight years with young people who have experienced secure care, which is the most intrusive form of intervention for troubled youths in the Swedish child welfare. Research using a QL methodology requires a delicate balance in maintaining professional boundaries in relationships between the researchers and participants and emphasizes how time and place are embedded in relations. I explore the complexities of research relationships over time and the effect of repeated research encounters on understandings of time. My reflections are grouped into three themes: emotional footing, intersections of time and place, and evolving research agencies. While emotions from early encounters became a resource for my reflections as a researcher, return interviews turned me into an embodiment of time, producing linear-time narratives of progress, and the agencies of both me and young people evolved within and beyond the research project. I offer some conclusions for qualitative social work research regarding the effects of emotional, temporal and spatial dimensions on researcher vulnerability and research relationships over time.