It sounds to me like the only time his 'girlfriend' was with him was when she need a drink, after he'd splashed the cash she f***** off to her other mates and left Stu to stand on his own like a lemon returning when her class was empty. Also Stu says he was sober, she he obviously drove. So he picked her up, droppeed her off and bought her drinks all night and she hardly spoke to him. The truth is starting to reveal itself.