WTF is up with her?! shes so self obsessed!?

one of my girl mates is so self obsessed. she starts telling me all of her problems yet wont even listen to mine. so at one bit i told her to eff off on msn. and i put a blog on bebo to see whether she thought it was about her. she did. she keeps talking down to me and acts as if she knows everything in the entire world! she always has a boyfriend and says she loves him but moans to us lot about dumping him. and whenever a lad says he fancies me she goes 'he's propabaly joking'. shes rude towards me. she said she fancied me then for ages kept saying 'if i was straight'. were 14 what should i do about her?