Why do you just walk on by?

The pain I feel is real, an't nothing fake about it.. every tear that falls, falls for a reason. Between the lies and broken promises my heart is shattered in to a thousand pieces at your feet just waiting for you to pick it up and put it all back togeather. But you look stright through it, and walk over it like it wasn't there. I'm the girl thats loves you and you say you love but then why do you just walk on by?