No, you don't. [ Terrified though she is, Clary's voice is strong when she says that, firm in a way that she's probably never spoken to Bellamy before. Whatever caused this, whatever he saw that made him feel this way, she's going to destroy however she can. ] You don't deserve any of this. You deserve to be happy, to be with people who care about you.
[ It's the next part that comes out softer, almost pleading: ] You deserve to be with me, and I'm not leaving this place without you. [ She means the forest, of course, but also the island. He promised to come back for her if he ever left and she knows she would do the same, that she'd fight as hard as she could — and then some — to get back to him. But especially now, hearing how unlike himself Bellamy sounds, there's literally nothing that could convince her to turn around. ]
1/2
[ It's the next part that comes out softer, almost pleading: ] You deserve to be with me, and I'm not leaving this place without you. [ She means the forest, of course, but also the island. He promised to come back for her if he ever left and she knows she would do the same, that she'd fight as hard as she could — and then some — to get back to him. But especially now, hearing how unlike himself Bellamy sounds, there's literally nothing that could convince her to turn around. ]