Felt necessity, or the phenomenon of experiencing some person or object as a felt need, plays important roles in structuring human agency. Philosophical treatments of the relationship between agency and felt necessity have tended to focus on appetitive needs and necessities arising from a particular type of care. I argue that we have much to gain by considering a third underexplored variety of felt necessity that I call “attachment necessity.” Attachment necessity has its own distinct parts to play in structuring (...) agency, and like its more familiar relatives, it can also illuminate important aspects of addiction and love. (shrink)