An intimate relationship is an interpersonal relationship that involves physical or emotional intimacy. Although an intimate relationship is commonly a sexual relationship, it may also be a non-sexual relationship involving family, friends, or acquaintances.

Emotional intimacy involves feelings of closeness, relatedness, and vulnerability. This concept has been proven to be an essential aspect for a healthy relationship. Once deeper feelings of liking or loving one or more people arise, it may result in physical intimacy. However, emotional intimacy may or may not be present in physical intimacy depending on the depth of the relationship. Physical intimacy is characterized by romantic love, sexual activity, or other passionate attachment. These relationships play a central role in the overall human experience. Humans have a general desire to belong and to love, which is usually satisfied within an intimate relationship. Such relationships allow a social network for people to form strong emotional attachments.