Final answer:
Romeo tells Balthazar he is going to Juliet's tomb to see her and to kill himself next to her, believing she is truly dead.
Step-by-step explanation:
In Act 5 of Shakespeare's Romeo and Juliet, Romeo provides to Balthazar the primary reason for his visit to Juliet's tomb, which is to see her one last time and to take his own life at her side. This act is motivated by his profound grief and the belief that Juliet is truly dead, which is a result of the tragic communication failure that leaves him unaware of the plan for Juliet to feign death. Despite Balthazar pleading with Romeo not to undertake such a dire act, Romeo's mind is set, and his actions lead to the catastrophic conclusion of the play.