What excuse does romeo give for behavior to the nurse?

Romeo tells the Nurse that he is in love with Rosaline and that his infatuation with her has caused him to neglect everything else in his life, including his friendships and family. He explains to the Nurse that Rosaline is the only woman he has ever truly loved, and that he finds her so beautiful and perfect that he cannot even bear to look at her directly. Romeo describes Rosaline as the sun itself, and he says that he would rather die than not be able to see her.