You and Percy were fighting, because of your insecurity. The blue-eyed man was becoming very close to Annabeth, his ex-girlfriend, and this made you anxious, as they had already experienced a lot of things together and he was afraid that Percy would leave you for her again. Because it wasn't enough to hear murmurs saying that he should have stayed with Annabeth. “By the Gods, I think I really should have stayed with Annabeth!” Percy shouted without thinking, regretting it immediately.