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.
Act II Scene III
In one respect I'll thy assistant be, For this alliance may so happy prove To turn you households rancor to pure love.
Act II Scene VI
Come, come with me, and we will make short work, For, by your leaves, you shall not stay alone Till Holy Church incorporate two in one
Romeo goes to visit Juliet after the party, and is sitting under her balcony listening to her rant on about her love for him. And he soon comes out and expresses his love for her, and shows her that he cares enough to come to her house with the risk of dying
Romeo is desperate to marry Juliet, so he goes and asks Friar Lawrence to marry them. He agrees, because he feels it may end the feud between their families.
Romeo and Juliet are married by Friar Lawrence. And they go on to express their love for each other. Their families have no clue about their marriage, or their love for each other at this point.