"You know not how to choose a man. Romeo? No, not he"(2.5, 40-41).
"What he says of our marriage? What of that?"(2.5, 50).
"Tis but thy name that is my enemy. Thou art thyself, though not a Montague"(2.2, 41-43).
"With love's light wings did I o'erperch these walls, for stony limits cannot hold love out..."(2.2, 71-72).
Juliette is supposed to be loyal to her family because she is a Capulet and Romeo is a Montague. Her family doesn't approve of Romeo and is preventing her from being with him. Because of her obligations to her family, loving a Montague is forbidden and is starting conflict with her and the other Capulets.
Juliette and Romeo are very bound to their last names which is making them question the true importance of it. After all, it is just a name yet it means so much more to their families. Being tied to the ones that share their name their whole life are causing them to rebel and find different meanings to their name.
The stony limits that Romeo was talking about resembled the rivaling families trying to separate them. Them being constantly held back and limited by their own family shows how they have to fight for their love because of it. Romeo trying to get past the walls symbolizes him trying to get pastries obligations.