Fate in this story is that Romeo and Juliet were meant to be together they call it star crossed lovers were meant to be. Another example of fate is when Romeo believes that Juliet is dead. An example of free will is
JULIET
O think'st thou we shall ever meet again?
ROMEO
I doubt it not; and all these woes shall serve
For sweet discourses in our time to come.
JULIET
O God, I have an ill-divining soul!
Methinks I see thee, now thou art below,
As one dead in the bottom of a tomb:
Either my eyesight fails, or thou look'st pale.

Fate vs Free will