In Act 3, Scene 1, What does Romeo say that Juliet's love has done to him? And what does Lady Capulet accuse Benvolio of and why?
In Act III, Scene 1, Romeo has just tried to keep Mercutio and Tybalt from fighting. Things went wrong, though, and Tybalt killed Mercutio. So Romeo killed Tybalt in anger.
After this happens, Romeo is really mad at himself. He says that Juliet's beauty (I assume that's the part you mean) has turned him into a woman (made him a coward).
When Lady Capulet comes on the scene, Benvolio is trying to tell the Prince what has happened -- that it was not Romeo's fault. But Lady Capulet says Benvolio is lying because he's related to the Montagues.