Who does athrun love?

First of all, in gundam seed Athrun was engaged to Lacus Clyne. Athrun met Cagalli when Cagalli crashed the Sky Grasper into an island where Athrun got dropped off to. But since Lacus betrayed ZAFT because of giving Kira Yamato Freedom, their marriage got annulled. In gundam seed destiny, Cagalli and Athrun are the love birds.