In this tutorial, we learn how to write a love song on the piano with Nate Bosch. Keys to writing a love song include making tenderness with a light sound and following through. The e-flat key makes a beautiful sound that is perfect for a long song. You can use the lighter twinkling sounds at the end to make a light sound that is also romantic. Go to an open octave to add a very light sound that will compliment your notes perfectly as well. Make sure you use sounds that will compliment vocal lines as well, if you plan on singing during this song. So remember, four chords are the root, four, six, and five. These will be your perfect keys to writing a great love song.