no regrets - Should've never loved you

But I let you in.
Gave you all my pieces, now look where I've been.
Nights I can't forget, tears I can't explain.
Loved you like a fool, got nothing but pain.
I should've never loved you, but you keep my hopes up high.
Said you knew how to treat me right, and you left me here.
Couldn't even say goodbye, say goodbye, yeah.
I should've never loved you, but I let you in.