There are 4 people/ 2 couples on the lease. We share 1 big living room, a big office. Each couple has his own bedroom. I wanted to move out of the apt since my boyfriend and I broke up. But he told me there's no way to rent the place to anyone else because there's no more bedroom in the apt and as long as I pay for the rent I am allowed to move out.

What can I do about it?