Searching for flatshare, Erasmus Student for one year

I am searching for a room, shared apartment, or a shared dorm-room. I will study International Relations at the Uni-Bonn for one year (October-July). I would like to share the apartment with German and other students from abroad, it does not matter. I am a very responsible and communicative person, I love to study and traveling, also I have a previous Erasmus experience in Prague, for 6 months. I also lived in dorms for the last 4 years. I speak English, Romanian, Russian, learning currently German.
I need a basically equipped room/flat. Bathroom and Kitchen can be shared, preferably no more than 30 minutes from University.