Addiction and certain varieties of interpersonal attachment share strikingly similar psycho-behavioural structures. For example, both the addicted and the interpersonally attached often report a common pattern of cognition, affect, and motivation directed toward the relevant object. This pattern includes, inter alia, recurring and recalcitrant thoughts about the object that captivate one’s attention, intense longing for the object, feelings of bliss upon obtaining the object, and feelings of dejection when one is deprived of it for too long. These thoughts, feelings, and desires tend to motivate the agent to seek out the object for various kinds of interaction. Neuroscientists, psychologists, and philosophers have often adduced these similarities between addiction and attachment to argue that many typical cases of romantic love represent addictions to one’s partner and thus might be appropriate candidates for medical treatment. In this chapter, I argue for the relatively neglected thesis that some paradigmatic cases of addiction are aptly characterized as emotional attachments to their objects. This has implications for how we should understand the nature of addiction and for the ethics of attachment more broadly.