I think Lucas not telling Brooke that Peyton kissed him was the worst thing. But really Lucas didn't kiss Peyton in the library- Peyton kissed Lucas and Lucas let her. It's not like he continued the kiss or even kissed her back. Peyton pressed her lips against Lucas's and that was it. If Peyton hadn't been shot, bleeding, and terrified of dying in the moment, then Lucas definitely should have stopped her. But I don't think Lucas did anything wrong in the moment considering one of his closest friends thought she was dying and gave him a peck on the lips for comfort. He can't throw a girl who thinks she's dying off of him and make her feel like a bad friend when he thought she might not have much time to live. But not telling Brooke afterwards was the bad move on Lucas's part.

Brooke wasn't exclusive with Lucas but she should not have been sleeping with Chris. Especially after saying "Lucas is the one for me." The only good thing about Brooke sleeping with Chris Keller was that it led to Brucas reuniting (and Brooke giving Lucas her letters) and having some incredible scenes. But otherwise I think it was an awful decision on the writers' part and so inconsistent to have Brooke sleep with Chris. It made no sense.

I was pretty torn between the two, but reading jemgrls comment made up my mind...
But I will give to Brooke that she was drunk and it didnt mean anything...

***PEYTON KISSED LUCAS!! NOT THE OTHER WAY AROUND!

haha couldn't have said it better. didn't have to think about this one because LUCAS DIDNT KISS PEYTON IN THE LIBRARY! as was said it was wrong that lucas didnt tell brooke, it was wrong that peyton kissed him though well shes dramatic and actually thought she was dying, you know because of all that blood that was just pouring out of her leg....
whatever.

brooke shouldnt have slept with chris, i'm not even sure how it hadn't as before them being seen in bed together we saw brooke clearly drunk out of her mind mumbling about how lucas is the one, not saying that chris practically raped her but....

theres some flaws in oth story telling.

This is a tricky one but I chose this because she friggin slept with Chris Keller!!! And because I never really understood why. And because it was Peyton who kissed Lucas. Idk.