This article explores how professional relationships may be helpful from the perspective of residents in community-based staffed supportive housing for individuals with severe mental illness (SMI) and/or drug abuse. Residents were individually interviewed about a relationship with a self-chosen staff member, the content of the help provided by this staff member and how this help influenced their lives. Using thematic analysis, we found that the residents described mutual relationships that resembled friendships and helpful staff members who carried out a variety of doings. Four domains of doings were identified: small human gestures, filling the hours with 'friendship', enabling the residents to take care of their own needs and fighting on behalf of the residents to ensure rights and benefits. To some of the residents, these doings had life-changing impact. We propose that mental health service management should facilitate friendship resemblance when matching professionals and service users, and we warn against a pitfall were present 'recovery ideals', such as independency, contradict the idea of helping by doing.