what happened?

you used to taste sweet
pure honey on my lips
your innocence
outlined by the heart you wore around your neck
you used to kiss me, then smile
then you stopped smiling
as if i didn't make you happy
soon, you stopped kissing me
and smelled like her
the heart you wore
was now put away
you used to let me in
and now we barely talk
i never knew what was once honey
would turn into vinegar