A defence of the idea that there are sui generis duties of love: duties, that is, that we owe to people in virtue of standing in loving relationships with them. I contrast this non-reductionist position with the widespread reductionist view that our duties to those we love all derive from more generic moral principles. The paper mounts a cumulative argument in favour of the non-reductionist position, adducing a variety of considerations that together speak strongly in favour of adopting it. The (...) concluding section connects this debate with larger issues in moral theory concerning the general idea of obligation. (shrink)