AbstractThe goals of this study were to examine to what extent lower likeability at the group level and lower friendship involvement can explain the bidirectional links between adolescents’ own and their friends’ victimization over time. We tested these processes by applying a cross‐lagged path model to a sample of 621 adolescents. Data were collected at four time points over the two first years of secondary school. Participants were asked to identify same grade friends within their school; classroom peer nominations were used to assess participants’ likeability as well as participants’ and friends’ level of peer victimization. Results showed bidirectional associations between adolescents’ own and their friends’ victimization by peers within the first year of secondary school. Moreover, the relation between adolescents’ own victimization at the end of the first year and their friends’ victimization next year was mediated by decreased adolescents’ likeability at the group level. Inversely, their friends’ victimization at the end of the first year predicted lower levels of adolescents’ own likeability over time, which in turn predicted adolescents’ own subsequent levels of victimization. Friends’ victimization also predicted adolescents’ lower friendship involvement during the first year, which in turn predicted decreased likeability, and ultimately higher levels of victimization.