[link to original on tumblr]
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But it also differentiates "I love you so" with "I wanna go." Those lyrics are above the same musical phrase but because "so" has a melisma and "go" doesn't, it illustrates that the singer/speaker doesn't want to dwell on going. Going doesn't receive the same emphasis that loving does. The next line confirms this: "I wanna go / But I hate to leave you."