1-room furnished flat, with bed for two people, for one year

Hello, my name is Yumi, my mother is Japanese and my father is French. I grew up in France, and have lived, studied and worked in Japan, the USA and Italy. I am starting to work in Hagenbach from early July. I am looking for a flat ideally from late July, 2015, until June 30, 2016.
I am looking for a luminous and spacious room. My boyfriend will probably live with me. So I need a bed for two people. I would like a window in my room, ideally located not in the ground floor.
I like to keep my living space clean and pleasant. I do not smoke. I do not need a TV.
I do not speak German yet but I will be learning it during my stay.
We would be happy to share a flat if you accept couples ! :) We want to make new friends!