Faye got burned by the anti-Aaron sentiment, and, it has to be said, by some element of the pro-Aaron contingent, who voted for Louise in the belief that Faye leaving is somehow better for his chances in the final, which I personally don't think will be the case.
If he has a massive huff, people will turn against him for being a miserable so and so. If he isn't a bit down about Faye going, people will say he was never invested in her at all and it's all been a cynical ploy.
Either way It's lose-lose for Aaron