"I love you for sentimental reasons
I hope you do believe me
I've given you my heart."
sen·ti·men·tal
/ˌsen(t)əˈmen(t)l/
adjective
of or prompted by feelings of tenderness, sadness, or nostalgia.
"That I fumbled your heart
Should've let go of my past for you, damn
You did everything I asked of you
Traveled cross country if I asked you to
But I'm just bad for you
I fumbled your heart"