Percabeth (It was worth the wait)

"Do you want to be my friend or not?" Annabeth repeated. Her grey eyes were like a storm and Percy found himself nodding without even thinking about it clearly.

"Yeah. Okay, I'll be your friend." Percy decided and nodded again to reaffirm it. Annabeth was a little scary but she had helped him when no one else had.

"Good."

OR

Percy and Annabeth as mortals, and becoming best friends and slowly loving each other