Dr. Barnes: You have to face that you didn't let Blair go, you lost her. To someone else.
Chuck: You don't know what I did. But yes, maybe there is something I need to do if I'm ever going to move on. I don't want to lie to you, I don't want to lie to myself. {he retrieves the Harry Winston engagement ring} If I've really let Blair go, I don't need this anymore.
Dr. Barnes: It's beautiful.
Chuck: I bought it to give to her. I've been keeping hold of it ever since. When really what I should do is just return it.