When she's crying to Luke in his office, after he proposed to Lindsay.

Yeah and also when she and luke fight in her office, and she starts to throw book at him

yeah the fight in the office was intense...shouting tears and just wow!

Yay! Thanks for adding this answer! Brilliant scene!

and the fight in her office was brilliant!

so sad!

actually my favourite is when she goes in the gym and she finds Lucas and she says "be happy Luke" I was crying !!!!!

^ that was my fav moment of the whole season.
that was very epic. next to the book burning.

This was such a sad scene. Peyton was hurting so much during this scene. I really liked this scene, it was such a sweet Breyton moment. Brooke was such a good friend to Peyton during this season (as always) but this scene really showcases that.
Second would be the book throwing scene, lotsa tears, anger and frustration in that moment. I cried alot during these two scenes.

this was a sweet breyton moment and im not even a breyton fan lol. ohh but i gota say the throwing the books at lucas was probablly the best. i hate leyton with a passion but that was an AHMAZING leyton moment. its my all time fave for them and for a couple minutes i actually enjoyed them lol.

this was sad & good, sad because leyton didn't look promising & peyton thought that she had lost him, good because it was a great moment for breyton you could really see ow much theier there for eachother.
And when Lucas reads his quote in the background about state & then says i was now & will always be in love with peyton sawyer<3
Leyton & Breyton(L)