I placed my heart under lock and key

I've spent all my life
On a search to find
The love who'll stay for eternity
The heaven sent to fulfill my needs
But when I turned around
Again love has knocked me down
My heart got broken
Oh, it hurt so bad
I'm sad to say love wins again
So I place my heart under lock and key (ooh, yeah)
To take some time and take care of me
But I turn around and you're standing here

How did you get here?
Nobody's supposed to be here (nobody's supposed to be here)
I've tried that love thing for the last time (oh)
My heart says no, no (no)
Nobody's supposed to be here (nobody's supposed to be here)
But you came along and changed my mind