I only remember one scene clearly. Kurt is sleeping; Puck comes in to his room during a sleepover or something similar. Kurt is badly startled (this is post-Karofsky). I believe Kurt tells him about Karofsky. Kurt and Puck end up together later and Puck tells Kurt that he went in to Kurt's room to seduce him, but couldn't go through with it when he saw how scared he was. Help? Please and thank you!
Found! Link in the comments.