Why has Romeo slipped away from his friends and where has he gone?

Romeo is in love again. This time he has fallen for the "fair daughter of rich Capulet." In Act I, Scene 5, he has spent a scant few minutes with Lord Capulet's daughter Juliet and has even elicited a kiss from the girl. Forgetting Rosaline, Romeo falls instantly in love with Juliet and after the party breaks up he can think of nothing else, even though he learns that Juliet is indeed a Capulet. Despite the fact the Capulet's are his family's sworn enemy, he decides to go back into Capulet's estate by jumping the wall into their orchard. He opens Act II, Scene 1 by saying, "Can I go forward when my heart is here." Mercutio's and Benvolio's calls fall on deaf ears as Romeo attempts to catch another glimpse of his new love. Fortunately, he is in luck, seeing a light coming from a window which proves to be that of Juliet's bedroom. Soon, the two are talking, with Romeo standing below her balcony as Juliet speaks to him from above. Romeo risks everything by showing up at this place. Juliet warns him, saying,

And the place death, considering who thou art,
If any of my kinsmen find thee here.

But Romeo, as he has displayed earlier in the play, is quite committed to love and will not leave until he and Juliet have talked further. This scene is excellently staged in Franco Zeffirelli's 1968 movie.