She said : "you're not in love with US right now ?". She did not use "with any of us..." so she considere that he can love them all as one entity and not only one of them. They will all end up together, the girls like each others, they like MC, the MC is not focus on one girl. I'm an expert and i can tell it will end as a harem. And i don't care about the scene from the future when he talk about his wife, its misleading.