"I Think I Love You" is a 1970 single by The Partridge Family, featuring David Cassidy, composed by songwriter Tony Romeo. The song was released at the same time as the debut of the network television sitcom The Partridge Family. During the show's first season the song was featured on the show twice as it was climbing the actual Billboard charts. The song hit number one on the U.S. Billboard Pop Singles chart on November 21, 1970 (42 years ago today), and also went to #1 in Canada, Australia and New Zealand. The only cast members of the television show to actually participate in the recording of the song were David Cassidy and Shirley Jones. The music on the song was played by veteran studio musicians such as Hal Blaine, Larry Knechtel, Joe Osborne, Louie Shelton, Tommy Tedesco, and others. A solid number one song... mostly forgotten on the radio.