Is this the start of a new creative coupling? A spy at GQ’s Met Gala afterparty tells us they overheard “Girls” creator Lena Dunham deep in conversation with “Love Story: John F. Kennedy Jr. & Carolyn Bessette,” star Sarah Pidgeon about working together. We hear the pair were hanging out chatting at the bar at Cafe Zaffri at the Twenty Two. A source tells Page Six Lena Dunham was talking business at the GQ Met Gala after party. Kevin Mazur/Getty Images for The Met Museum/Vogue “Lena was plotting a show with the JFK show girl” a source excitedly told Page Six. Reps for both did not get back to request for comment. The “Too Much” co-director has been back in the news cycle lately promoting her  her new memoir, “Famesick .” We hear Dunham and “Love Story” star Sarah Pidgeon were heard “plotting” to work together. Kevin Mazur/Getty Images for The Met Museum/Vogue The Ryan Murphy show is a hit.…