Even though Percy escaped from Tartarus, a little part of him will always be down in that pit, raw and terrible. The evil he did down there left him feeling just like the things he fought so hard to kill; a monster. He is ready to end it all until he is reminded of the reason he fell into Tartarus in the first place: Annabeth. He fell in to save her, to preserve the mere possibility of seeing her fluffy blonde hair blowing in the wind once again, her striking grey eyes catching the sunlight as she gazed back at him. Annabeth gives Percy a reason to live once more, a reminder of all the beauty left in this world. She is the only thing that matters to him anymore, making him willing to do anything to keep them together. After all, he made a promise, and Percy Jackson always keeps his promises.