"Troubling Love" is the name of an Elena Ferrante novel, but it could also be used for a Sondheim revue. Again and again, Sondheim looked at examples of unrequited love: Herbie, Sally Durant, Countess Charlotte, Mrs. Lovett, John Hinckley, Jr., Mary Flynn.... Another thing about Sondheim. He always enjoyed making use of a gerund. The "continuous present." A gerund implies a journey from A to B. "Being Alive," "Waiting for the Girls," "Finishing the Hat," "Getting Away With Murder," "Putting It Together," "Losing My Mind," "Not Getting Married," "Good Thing Going," "Growing Up," "Opening Doors." "Loving You," from "Passion," is both (a) an unrequited love song and (b) a gerund/journey song. Disgusted by the thought of "toning down" her love, Fosca makes an observation. Loving you is not a choice. It's who I am. Loving you is not a ch...