I was on OTHforums when someone asked about the 布鲁克与卢卡斯（Brucas） break up and I realized I've got so much to say about it.
Brooke on Peyton.
If I remember it correctly: 1] Peyton told Brooke about her feelings for Lucas 2] Brooke found out about the 图书馆 kiss
Peyton telling Brooke about her feelings has a big effect on the 布鲁克与卢卡斯（Brucas） break up. Brooke could have forgiven the 图书馆 kiss, she could've chosen to believe that it was innocent, but 你 cannot do that if 你 know that Peyton has feelings for Lucas. I know in the Leyton timeline it isn't like that, but in Brooke's it was. Anyone in Brooke's place...