I highly doubt Amy likes him like that. She knows it's 'The Joey Essex Show' and she knows a relationship with the star will put her front and centre. It's pretty obvious she was only put in there for him, and she's after maximum exposure.
She seems like a smart enough girl who in real life wouldn't entertain the thought of a relationship with Joey. She's also shrewd enough to realise he's the chosen one and being close to him, instead of criticising him a la Matthew will result in a positive edit, and increased screen time.
Good on her I say. She should play it for all she can.