It's never easy losing love like this Calling us a quits How was I supposed to know? That heartbreaking is just as hard No, even worse When you still love the person, but you're torn apart When I first saw you there five years ago I could've told you that I'd love you so I've never seen me here letting you go Like I just did this weekend Shit, it hurts so bad, me leaving So, where's the rule book to breaking your heart? 'Cause I'm falling apart And it's my doing (and it's my doing) Where's the rule book to mending my heart? 'Cause it's all torn apart And it's my doing (and it's my doing) Every time the dog barks, my heart skips a beat 'Cause I wonder if it's you Still chasing after me I think the hardest part is that knowing that I had to do it And trusting that we'll make it through this 'Cause true love finds it way back home When I first saw you there five years ago I could've told you that I'd love you so I've never seen me here letting you go Like I just did this weekend Shit, it hurts so bad, me leaving So, where's the rule book to breaking your heart? 'Cause I'm falling apart And it's my doing (and it's my doing) Where's the rule book to mending my heart? 'Cause it's all torn apart And it's my doing (and it's my doing) Where's the rule book to breaking your heart? 'Cause I'm falling apart And it's my doing (and it's my doing) No one really seems to care I'm the bad guy, it's only fair Any authors to this book out there Let me know, I'd love to hear The rule book to breaking your heart 'Cause I'm falling apart And it's my doing (and it's my doing) Where's the rule book to mending my heart? 'Cause it's all torn apart And it's my doing (and it's my doing) Where's the rule book to breaking your heart? 'Cause I'm falling apart And it's my doing (and it's my doing) Where's the rule book to breaking your heart? 'Cause I'm falling apart And it's my doing