The development of social media is increasingly massive, forcing increased interaction from its users. So far, studies on the effect of using social media only refer to one particular social media. This study aims to examine the effect of social media use on loneliness, brooding behavior and social comparison. The research method uses a quantitative approach with samples taken from social media users using google form. The results showed that from 82 respondents, most of them were social media users in the heavy user category. This research also found a positive relationship between the use of social media with loneliness, rumination and social comparison with an R Square value of 0.45 with sig. 0.001. The higher the use of social media, the more people feel lonely, which makes them reflect and make social comparisons.