What is your problem?

Through a series of 90's sitcom style misunderstandings, the gang learns of Archie's secret narcissistic delusional ideas he's formed about them. He believes Betty is still in love with him and unable to move on, and that Jughead shouldn't spend his time with anybody but himself. While they uncover the truth behind his beliefs, Archie is completely unaware of the disturbed nature of these ideas.