Cameron was at her wits end. She was tired and fed up. She hated herself for thinking it, but at the moment, she almost wished that Chase had not survived. It would be easier to mourn his loss if he wasn't around.
She knew that he didn't love her anymore. Robert wanted nothing to do with her. He asked that she not visit anymore. He said that he needed time to himself and she was distracting him. He would fake being asleep when she went to visit. He wouldn't return the phone calls that she placed.
She had a guess as to what was in the letter on House's desk. She had gone through his mail earlier like she always did. Immediately she recognized the handwriting. It was more than obvious what was in there, especially because he went out of the way to make sure her hands didn't touch it.
And now, now he went and got himself sick. Allison fully blamed Robert for being sick. He gave up. And by giving up his body had picked something up and wasn't fighting it. The refusal of medication was the last straw for Allison. If he didn't want her, and he didn't want to live than he could just go away. She wanted nothing to do with him.
She had thought that he loved her. He seemed sorry about the cancellation of the wedding. But he never brought up the idea of setting a new date. Maybe it was for the best that he didn't get a chance to get the marriage license. Save the people of New Jersey a bit of paperwork.
In the background she heard House, Cuddy, and Foreman. But she didn't care. At that moment, she didn't care about anyone but herself. She wanted to be selfish. She was tired of caring for everyone else. She just couldn't do it anymore.