A person chronically plagued by ambivalence. Or just an ambivalent person.
John: 'You don't ever seem to either just love or hate something.'
Ellen: 'I do love things, often.'
John: 'But you also hate them.'
Ellen: 'I'm ambivalent?'
John: 'Yeah, you love AND hate things.'
Ellen: 'What, you're saying I'm a lovinhater?'
John: 'Definitely, man.'