How can I believe(stopped believing)

With a heart that is broken into pieces How can I believe You left me and went back to her without a reason How can I believe How can I believe that your sincere When all these things I hear About you and her are floating around You said that you loved me But now I know that that's not true It seems that you lie to me in everything that you do How can I believe But now it's over, it's through There's not a thing that you can do It's sad but it's true All because I stopped believing in me and you