Blank verse is unrhymed and quite a lot of Romeo and Juliet is in rhyme. "If I may trust the flattering truth of sleep, My dreams presage some joyful news at hand" is an example of blank verse.
But soft! What light through yon-der win-dow breaks?
It is the East and Ju-liet is the sun!
A-rise fair sun and kill the en-vious moon,
Who is al-rea-dy sick and pale with grief
That though her...
There isn't any free verse in Romeo and Juliet--not in Shakespeare's in any case. Perhaps you are thinking of blank verse. There is lots of that. An example is the first line, "Two households both...