I Will is a song by The Beatles that was released on The Beatles(White Album). It was written by Paul McCartney (credited to Lennon/McCartney) and features him on lead vocal, guitar, and "vocal bass".
A love song for Paul McCartney's future wife Linda Eastman, I Will was one of the songs worked on by The Beatles and their associates while in Rishikesh, India. Although the music came together fairly easily, the words were…
Who knows how long I've loved you
You know I love you still
Will I wait a lonely lifetime?
If you ask me to I will