Looking for a roomate/accomodation for a one-month stay in Sofia

I am a master psychology student from Belgrade and I will be in a one-month study visit in Sofia during October 2014. I need a roomate or a place to stay for that period of time. As a true psychologist, I am open to every suggestion and I am very flexible. The only two conditions that aren't negotiotable are private room and internet access. i would like to use this experience not just for an academic growth, but for personal too and meeting new people.