When a girlfriend or potential girlfriend consciously decides to be really high-maintenance and a pain in the ass just so they can sound all "If you can't deal with me, then you ain't right for me" sassy n shit.
X: Hey man, why you look so bummed?
Y: My girlfriend is being so fucking bitchy lately, but I think she's doing it on purpose. She wasn't a bitch before.
X: Looks like she's got the Diva Complex. There's no hope for your sorry ass.