Chuck finally tells Blair he loves her back.
From 2.25 "The Goodbye Gossip Girl"
Because everyone is asking that, the song is called "Season of Love" by the Shiny Toy Guys.
The song at the end of the video is
"Hot Stuff" by Ashlee Simpson. (It wasn't supposed to be just audio, but YT messed it up.
₪ Blair: I want to believe you, Chuck, but I can't. You've hurt me to many times.
₪ Chuck: You can believe me this time.
[₪ Blair: Why?
₪ Chuck: Because I'm not Chuck Bass without you.]
₪ Blair: That's it?
₪ Chuck: I love you, Blair.
[This is the original script, but Chuck left out some lines.]
All Credit goes to THECW