they look so happy and then I remember one of the first things Annabeth said when she met Leo, Piper, and Jason. "How long have you been searching for your boyfriend?" "Three days, six hours, and about twelve minutes." SHE JUST SOUNDS SO HEARTBROKEN.
In this picture i think someone read all of the older Percabeth moments to young Percabeth i can see young Percy thinking, "I would NEVER fall into Tartarus for you" and Annabeth is thinking, "I would NEVER say 'i love you' to you.