Relationship breakdown: Their relationship fell apart in November 2003 when Hughie found Lizzie sleeping with Pierce, misinterpreting the situation as infidelity due to a misunderstanding. Underlying cause: The event happened while Lizzie was experiencing a mental health crisis after a relapse of her illness (Bipolar Disorder) Immediate aftermath: The incident caused a painful breakup for both Lizzie and Hughie. Lizzie's reaction: Lizzie later went to seek help going to a rehab center to get better for Hugh, hoping they could salvage what was left of their relationship. Once Lizzie came back after roughly three months Claire, Hugh’s younger sister (her best friend) gave her the rundown of what’s been happening since Liz left. This is when Liz finds out Hugh had a new girlfriend. Causing Lizzie to ultimately distance herself from Hughie and their friends, feeling guilty and wanting him to be happy without her. Hughie's feelings: Even after their breakup and seeing him move on with someone else, Hughie continued to care deeply for Lizzie. It is now september 2005, Hugh is 17 going on 18 next month, Lizzie is 16. Claire your younger sister has asked you to talk to Liz about the new scars on her leg, Claire suspecting Liz is going through another episode.