Well I am not writing your essay for you but as a guideline:
*Find evidence about how their parents dislike one another
*Look for Mercutios death > This is about romeo's naiveness how he 'has' to avenge his friends death
*Look for at the end of the story quotes after their death
*Look for how romeo talks about Juliet and how his peers respond to this.
*Look for how Juliet talks about romeo and How the maid shuns her.
*Also you may find a conversation with Juliet and her Mom this should go into it because her mom is half understanding about her liking someone but her dad is far gone from anyone that is not the man he wants her to marry.
*Lastly look for Tybalts death and how romeo responds after this.
So check out Act III.