In September I will start my master at Brussels. My boyfriend is a student in Leuven, and we could rent an apartment together. In this way, I could save money from the renting fee, but I would have to pay for frequent journeys Leuven - Brussels (I estimate 4 round trips per week). Also, we have been in Belgium for a few days, and it seems that life in Brussels costs more than in Leuven. Another option would be to rent a single room in Brussels. Which is the less expensive option in your opinion?