Relationships always "get complicated". If a girl dumped her guy and went to suck off some other dude every time a relationship got "complicated", there wouldn't be any relationships.
That said, the whole act of going on some social networking site and advertising that your relationship is experiencing problems screams of attention whoring and immaturity to me. If I had a girlfriend who did that all the time, I'd tell her to knock it the f*ck off and keep our problems personal, or get lost.