Why is Juliet more concerned with Romeo's feelings than her own manners in Act 2, scene 2?

Juliet is in love with Romeo and love is more important than manners or family name to her.

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.