VioletPrue, thank you for your clear and very straight answers. I think I will end up paying the remaining months, as I don't want to put in troubles my flatmate. I still think that this way isn't fair, but you're right: there is nothing written (except the email messages exchanged that, I suppose, ...

Hallo allemaal, Sorry for writing English, but I don't speak yet Dutch. I hope someone will read and reply anyway. This is the situation. Back on October 2009, my current flatmate "lost" his flat mate and was in need of a new person willing to share the apartment (and the rent). At that ti...