While Harry's friends are his real chosen family and a very strong and supportive one, especially with the Weasleys, I think Sirius also staying alive and being Harry's family gives Harry an adult/surrogate son relationship that he doesn't have. While Molly and Arthur Weasley are close, Harry doesn't rely on them or expect them to act like parents to him. (I'm totally with you on choosing family though!)

Yasona//Slytherin//2