"I'll Be True to You"

Yester-day I figured out the chords for "I'll Be True to You," and I remembered a couple things I noticed about the song back in September 2015:  the internal rhyme in the line "My heart is sure you're the girl I've waited for" illustrates the singer/speaker's certainty, and the repetition of the title line (along with its own emphatic "yes, I will") assures the listener of the singer/speaker's commitment.