Is my gf crazy or insecure?

my girlfriend says shes more of an adult than i am...heres the thing, she texed me one night and i was extremely tired to chat n she went off on me ignoring me after that. now, her phone is disconnected due to her not payin her bills. theres no way i can contact her. she goes into chatrooms telling pppl how im immature aand basically making an *** of herself. ppl in the chat were pickin on her n this one dude said the reason she was mad was because he wont meet her. i love this grl but sometimes HER idiotness drive me crazy. now she thinks i don't love her now we dont talk cuz of her phone been off. she never told me shes on ssi, i found out from the chat she was havin with others...help