Conversation so far:
How does Season 1 start off?
In the pilot episode, Chuck attempts to rape both Serena and Jenny Humphrey.
Who are Serena and Jenny Humphrey?
his step-sister at the time, Serena.
Did he succeed after attempting to rape them?
he attenuates his behaviors as a sexual predator and becomes more of a manipulating womanizer.
Did he try to rape anyone else?
CANNOTANSWER.
Did his womanizing ways catch up to him?
This leads Chuck to have a temporary rift with both Blair and Nate.
What happens during this temporary rift with Blair and Nate?
CANNOTANSWER.
What are some other very important aspects that takes place in Season 1?
At Bart and Lily's wedding at the end of Season 1, Chuck apologizes and confesses to Nate that he was in love with Blair.
Does Blair say that she's in love with him too?
She accepts his apology and the two kiss.
What happens after Blair and Chuck kiss?
However, as they are about to embark on a trip to Tuscany together, Chuck gets cold feet.

Question: What does Chuck do when he gets cold feet?
Self-contained rewrite: What does Chuck do when he gets cold feet?