What To Do With Obsession?

My friend obsesses over famous people to no end. First she freaked out over some dumb nascar driver for a year and 'added' him on her myspace. (Everyone knew that it wasn't REALLY him, but she refuses to listen) And celebrated his birthday. Then she idolized some polish wrestler for a few months calling him her bronze god and worshiping him sending him letters and messages on her myspace thinking it was 'really' him. Now she's freaking out over some baseball player who she added on her myspace and is going nuts over him too. She ditches her family, boyfriend and friends to watch anything on tv that has to do with him and cries hysterically if he gets a flu or something. When Daler Earnheart died she mourned for 5 MONTHS and cried and yelled at people and refused to go to school for more than a week. She's annoying everyone and won't listen to anyone who tells her she has a problem. She instantly obsesses over famous people and says they are her soulmate in life. What do I do!?!?