23 year old man, looking for accomodation in Rotterdam

I'm a 23 year old student of Economics from Barcelona currently on my fourth year. I consider meself a very responsible person as well as an easygoing person plus very social. I like party but I also like to stay home watching TV or playing something or just chit chatting.

I'm going to stay in Rotterdam from the end of August until the end of December, I have enrolled in 4 subjects so I'll have time to touring around the Netherlands and surroundings and I would like to have some touring partners.

I'm looking for housing during my stay in Rotterdam, I don't care if I have a male or female flatmate, just looking for people that study as I do and like party but no so much. I don't have a strict preference about a flat, a studio, etc.