Individuals in mixed‐sex (n = 248) and same‐sex (n = 159) romantic relationships completed several online questions for each member of their social network, including the member's perceived support for their romantic relationship. Those in same‐sex relationships perceived less support for their relationship, but only from family members, not from friends. Levels of relationship support were lower among subjectively more distant network members than among closer network members. As hypothesized, associations between perceived support for the relationship and relationship, mental, and physical well‐being were weaker for those in same‐sex compared to mixed‐sex relationships. Principles of social network management and attributional ambiguity were used to explain the findings.