Although this a beautiful soliloquy from William Shakespeare's A Midsummer Night's Dream, I'm afraid you'd better search for another piece for your audition. The lovesick Helena's speech concerning the power of love is not in blank verse, but in rhyming verse. The definition of blank verse is a type of non-rhyming verse with a definite meter, usually in iambic pentameter. Helena's soliloquy rhymes throughout, as does most of the longer speeches in A Midsummer Night's Dream. You might consider Titania's speech in Act II, Scene 1 when she converses with Oberon. It is in blank verse. Good luck with your audition.