Six days into shooting our “Beach House” episode, I had my most difficult moment of the season. We had been living on Long Island, filming for longer than we usually do. One of the underlying conflicts in the episode is that my character, Marnie, has planned this very elaborate and controlled bonding weekend with her friends. Hannah (Lena Dunham) wants nothing more than to thwart those efforts and invites over a bunch of people, so the (mostly improvised) dinner scene turns into a free-for-all where insults directed at Marnie — and characters coming to her defense — are flying back and forth. After filming for an hour or so, my exhaustion started to blur the lines between myself and Marnie, and I started to become genuinely upset. When they finally wrapped the scene, I fell apart. To this day, I can’t quite figure out why I was so sensitive. I guess after playing one person for so many years, I started to feel her feelings.