24 year old boy looking for good and clean accommodation in Lisbon!

If I have to describe myself:
My name is Boy, 25 years old, a bit older than most students are. This makes also the very difference in responsibilities f.e.
I'm very responsible, having a longterm relationship at the moment. I'm going to study in Lisbon during the 2nd semester of the academic year 2015-2016 and I take it very seriously.

For this reason I'm looking for a studio or shared appartment with my own room and a private bathroom (or sharing with maximum one other person). I'm not looking for male or female housemates in particular, so let me know if you have any space.

From 6-9 september I'll be in Lisbon to join the academic opening of Catolica University. I will be seeing appartments, flats, studios and hotels as well for staying during my semester.