I'm In Love
Given the tendency of Lennon and McCartney in the early years to write love songs in the first person (using "I," "me," "my" a lot), it is no surprise that they wrote a song called I'm in Love. The curious thing is that the Beatles never recorded it. John Lennon wrote I'm in Love in 1962 or 1963. At the request of George Martin, Lennon provided a copy of the song to two other bands under contract with Parlophone at the time: The Fourmost and Billy J. Kramer & the Dakotas. Each group recorded I'm in Love in the Abbey Road studios. Martin chose to release the version performed by the Fourmost, and it rose to number 17 in the UK charts with an Isley Brothers cover (Respectable) on the b-side. Earlier, Lennon did record a demo tape of the song, but that has never been made publicly available. It is not known for sure why neither Lennon nor Martin pressed to have I'm in Love released by the Beatles, especially given their urgent need for original material for album production. Evidently neither thought the composition was "up to snuff," and very little subsequent comment exists from the principals about this tune.
You can compare the versions here: http://www.thebeatles.org/videos