Looking for accomodation in Münster for this summer (also looking 4 roommate)

Hi, I'm a spanish biology student. I'm 20 years old (21 in July).

I will be for three months (starting in June) in Münster, doing some research in a lab as a student.

I'm looking for place to stay, it would also be nice to find a roommate to split the rent cause I don't have a big budget. 

I'm a tidy person, responsible, cooking abilities. 

Speak Spanish/English, trying to learn some German