Relationships are the foundation upon which all youth development rests. Young people grow, learn, and develop through relationships. Relationships socialize youth and subsequently encourage identity development. Relationships provide connection, a necessity for all humans. Supportive relationships promote positive academic, behavioral, and psychological outcomes, while also buffering against negative outcomes such as substance abuse. Relationships are the vehicle that propel adolescent development forward. Traditionally, there has been a schism in how developmental scientists study relationships, with studies focused either on relationship quality and supports within dyads (with one other person) or general structures of relationships and social capital across social networks. While these lines of research provide considerable insight into the power of relationships, resources, and networks for youth development, each approach raises important questions that could be addressed by the other. Therefore, several researchers have recently begun to examine youth-adult dyads from a developmental systems perspective. From this perspective, each person in a relationship influences and is influenced by the other person and each dyadic relationship is embedded within a broader ecology of relationships, supports, opportunities, and barriers. Building on this work, the authors take the perspective that these streams of research need to be further integrated to provide a more accurate depiction of how relationships affect youth development. In this brief, the authors present a web of support framework to describe how youth relate to adults and peers in their lives and how these relationships provide the developmental supports necessary for young people to be on a positive developmental trajectory. The authors also discuss implications and pose larger questions about the use of this framework in research and practice.