After careful deliberation, I'm opting for "Fishcake Girl".
Fishcake girl was in her late twenties, living at home. She became very obsessed by a string of crap blokes. She actually stalked them, driving past their house at night etc.
She was obsessed by "Paul" at one point. He drank in the pub behind her mum's house, stopping off at the chippy for a fishcake after last orders. She used to hang about the chippy waiting for him to come out so she could "accidentally" bump into him. He's then take her home for some shagging.
Paul eventually moved to Antwerp, so she took a plane to visit him. They spent the entire weekend in bed. She returned brokenhearted because he had only seen her as far as the bus stop back in Antwerp, though he had bought her a ring. On closer questioning, it turned out she had given him the money and he'd actually handed it to the cashier.
The real low point came when he returned home for a week and she took the whole week off as annual leave and sat in the window halfway up the stairs hoping he would drive past.
Does anyone know anyone sadder than this?