if Jensen is correctly remembering how the scene was written, and that he replaced "I love you," with "We’re family," then that means the original script actually said:
"It’s me. I love you. We need you. I need you."
Ship ship ship ship *shipping intensifies*
So, I have this headcanon that on Fred and George’s first day of Hogwarts, when Fred was called for sorting, George went up instead, and the hat realised, and told him off. George ran back to Fred sniggering, and the kids found it hilarious, and the teachers just rolled their eyes/facepalmed at what they’d have to put up with for the next 7 years.