Kismet
This IS me.
You know, if I didn't know any different (and I don't) I'd almost believe they put that man-hater Lina in the house expressly to f*ck David over. Her overwhelming interest in David at first, and now their mutual utter hatred of each other (and for her, of all the guys) seems totally fishy. Her whole edit has revolved around chatting up David, bitching about David, fighting with David and talking about David in the Diary Room. It's shady with a capital S.
Hmm.. I see it a little differently. In a way it's good she's there to draw more attention to David and not necessarily in a bad way. He doesn't bitch about anyone behind their back. Decent people notice things like that.