During adolescence, friendship affiliations and groups provide companionship and social and emotional support, and they afford opportunities for intimate self-disclosure and reflection. Friendships often promote positive psychosocial development, but some youth learn and adopt antisocial attitudes and deviant behaviors through their friendships. Clearly peers matter, but can the monolith of peer group effects be deconstructed in a way that advances theories of peer influence? In this study, the authors use p* modeling to explore connections between network structures and social influence in a seventh-grade friendship network. Specifically, p* parameters reveal how bullying perpetration, dyads, triads, and more complex group structures contribute to network formation, providing fine-level detail about the operation of internal peer group structures. (Contains 2 figures and 2 tables.)