The poem Mad Girl's Love Song by Sylvia Plath uses the following form:
Villanelle is a poetic form that has a very distinct structure. As opposed to a sonnet which consists of fourteen lines (three quatrains and a couplet), villanelle is made up of nineteen lines. It has five tercets (three lines) which are followed by a quatrain (four lines). This poetic form has a fixed verse form, and there are refrains - in this case the lines:
I shut my eyes and all the world drops dead
and
(I think I made you up inside my head)
which are repeated throughout the poem.