The suddenness of Romeo and Juliet’s love, the circumstances in which they are a part—that of belonging to feuding families, and their extreme youth all contribute to the feeling that this is a temporary relationship. Romeo and Juliet’s concern is temporarily keeping their marriage secret—hoping to eventually fulfill the role of peacemakers.
An example of Romeo and Juliet’s concern with who they are is illustrated in Juliet’s balcony speech:
O Romeo, Romeo, wherefore art thou Romeo?
Deny thy father and refuse thy name!
Or, if thou wilt not, be but sworn my love,
And I’ll no longer be a Capulet. (-39)
‘Tis but thy name that is my enemy;
Thou art thyself, though not a Montague.
What’s a Montague? . . What’s in a name?
That which we call a rose
By any other word would smell as sweet . . (-43/46-47)