Ophelia's Insanity

Ophelia is going mad because she sees what Hamlet is going through and does not know what to do without the previous Hamlet.  However, Hamlet is not actually mad but everyone sees him as mad.  Also, after hearing about Polonius' death, she does not have a fatherly figure in her life and no family as of right now.  Laeretes is on his way back from France.  With this lack of family to talk to about Polonius' death and other issues in her life, Ophelia is making herself insane.