I let you in

I opened my heart to you
I let my guard down
You said you would never hurt me
You said you would never leave me
I told you I loved you
You told me you loved me
Now I sit here with my heart in two
Now your sorry
Now you want me back
I opened my heart to you
I let my guard down
You said you would never hurt me
but you did
You said you would never leave me
but you did
And I let you in