Percy let me go, she croaked. You can't pull me up.

Never

That was one of the many reasons she loved him, even if he was an Olympian-sized pain in the podex

Without you, I doubt Percy could find a way out of a paper bag.'
'True', Annabeth agreed.
'Hey!' Percy complained.

You promised, Seaweed brain. We would not get separated! Ever again!

She tied her blond hair back with a strip of denim torn from her pants leg, and in the fiery light of the river, her grey eyes flickered. Despite being beat-up, sooty, and dressed like a homeless person, she looked great to Percy.
So what if they were in Tartarus? So what if they stood a slim chance of surviving? He was so glad that they were together, he had the ridiculous urge to smile.

For a moment, Percy actually remembered what it was like to be happy. He had an amazing girlfriend. They could have a future together.