As more gay men are tested for antibodies to human immunodeficiency virus (HIV), serostatus may influence the formation of primary partner bonds in this community. We compared seropositive (n = 157), seronegative men (n = 205), and those who had not been tested (n = 158) from our ongoing AIDS Behavioral Research Project (total response in 1988 = 540). Subjects responded to mailed surveys regarding sexual behavior, relationship status, HIV antibody testing and serostatus preference when forming relationships for romance and friendship. Sixty-eight percent of seropositive gay male respondents reported no serostatus preference in partners for romance, while 83% of seronegative respondents and 74% of untested respondents preferred seronegative partners for romance. In addition, 15% of seronegative respondents and 12% of untested respondents preferred seronegative individuals for friendship. Seropositive individuals were much less likely to be desired for romance or friendship by seronegatives and those who have not been tested--at a time when emotional support and companionship are obviously needed.