Because I am an Assassin and that is a dangerous life. Because I am wanted by the Crows and anyone that cares for me is a target. Because I killed the last two people that laid claim to my heart. Because losing them killed me and I cannot endure such things again. Because-

Villains don't get happy endings, Anders.

[ And is he not the Crow's own villain? The shadow that haunted them, hunted them and many nobles of Antiva alike? ]