In 2 studies, the authors examined whether relationship goals predict change in social support and trust over time. In Study 1, a group of 199 college freshmen completed pretest and posttest measures of social support and interpersonal trust and completed 10 weekly reports of friendship goals and relationship experiences. Average compassionate goals predicted closeness, clear and connected feelings, and increased social support and trust over the semester; self-image goals attenuated these effects. Average self-image goals predicted conflict, loneliness, and afraid and confused feelings; compassionate goals attenuated these effects. Changes in weekly goals predicted changes in goal-related affect, closeness, loneliness, conflict, and beliefs about mutual and individualistic caring. In Study 2, a group of 65 roommate pairs completed 21 daily reports of their goals for their roommate relationship. Actors’ average compassionate and self-image goals interacted to predict changes over 3 weeks in partners’ reports of social support received from and given to actors; support that partners gave to actors, in turn, predicted changes in actors’ perceived available support, indicating that people with compassionate goals create a supportive environment for themselves and others, but only if they do not have self-image goals.