I don't know if you've finished the play... Or movie... (I have the 60s one!! With Olivia Hussy and Leonard Whiting !!! Hooray!!!) But... Um. That's what they were doing.

They just decided it would be better to let everyone assume Juliet was dead so that no one would come looking for her. Juliet got poison from the apothecary that allowed her to sleep in a dead-like state (like SNOW WHITE!!! OMG!) for a while so they could bury her and then Romeo could meet her there later and they could run off together (like in "Anywhere" by Evanescence!!! HUZZAH!) but the friar, who was supposed to tell Romeo didn't get there in time. Romeo found out Juliet was dead before anyone told him that it was just a disguise. That she was still ALIVE. So he went to her and killed himself. Then you know, she got up and killed herself. All that jazz. They were both dead... All because the stupid friar took his cotton-picking time. Oaf.
Ze Queen
(shakespeare's actually pretty cool...

)