A sense of closeness (or intimacy) is important in nearly every relationship in life, whether it is within friendships, family, or romantic relationships. In the current thesis, intimacy is measured within four specific dimensions: emotional, physical, intellectual and spiritual. Research shows that intimate relationships have been linked to mental and physical health outcomes. In addition, there is a novel explanation for the link between intimacy and health through rumination and sleep quality. The current study examined 2 primary aims: 1) to examine the relationship between intimacy and depression ; 2) to assess the role of intimacy, rumination and sleep quality on mental and on physical health. Results for Aim 1 suggest that there is a link between intimacy and both depression and physical health; where the higher the intimacy the lower the depression and the better physical health. For Aim 2, results indicated that there was a significant serial relationship between intimacy, rumination, sleep quality and both depression and physical health; where in the first model, higher intimacy predicted less rumination, better sleep quality, and lower depression; and, in the second model higher intimacy predicted less rumination, better sleep quality and higher physical health. The current study suggests that intimacy does have its own distinct contributions to health outcomes and that rumination and sleep quality do have a implication on intimate relationships.