Approximately one-third of autistics report intimate relationship experience, but few studies have explored neuromixed relationships from the perspectives of non-autistic partners. Non-autistic partners increasingly use peer-led online groups to seek support. The purpose of this study was to capture a theory that reflects the basic social experience of individuals who use these support groups using classic Glaserian grounded theory methodology. Online interviews were conducted with 162 non-autistics who believed that they were in neuromixed relationships. Data were concurrently collected and analyzed using constant comparative analysis. Participants described varying views of autism, from a difference to a disorder, which defined the context of their relationships. Five relationship profiles emerged--mutual partnership: viewed partners as = companionship: viewed partners as friends but lacked a deeper connection; caregiving: viewed partners as dependents and compared relationships to parent-child dyads; detachment: viewed relationships as broken beyond repair and isolated selves from partners; and discriminatory: believed and circulated negative generalizations about autism. Many participants who were dissatisfied in their relationships shared that their partners were not formally evaluated and did not self-identify as autistic. Future research should explore ways that autism labels are (mis)applied by the general public based on negative stereotypes about autism.