Just be sure when you say 'I love you' It's a sin to tell a lie. Millions of hearts are broken, Just because those words were spoken. I love you, and yes, I do, I love you. If you break my heart I'll cry Just be sure it's true, when you say, 'I love you' It's a sin to tell a lie. I love you, yes, I do, I love you. If you break my heart I'll cry Just be sure it's true, when you say, 'I love you" It's a sin to tell a lie. It's a sin to tell a lie.