At the beginning, Brooke and Chase are bestfriends forever. He was secretly in love with her, and he was the most important person in Brooke's life.
Brooke never had chance in love,
Lucas cheated on her with Peyton, Nick with some random girls and Felix destroyed her bestfriend reputation.
Everytime Brooke was heart-broken and Chase was there for her. Someday, he decides to stop letting her hurting herself, so he went to her locker and ask her out on a date with him, she was REALLY suprised at the beginning, but fell in love with him immediatly...