FYI, you will be on the hook for the entire lease, regardless if he chooses to move out and not pay any more. My husband had a roommate before we were married. Both names were on the lease. Roommate chose to move back to his home country 3 months into the lease, and left my husband with 2 days notice. Zach talked to the leasing office, and they told him too bad--both of you are responsible for 100% of the lease if the other bails. They don't care who pays the rent, only that it is paid. He even talked to a lawyer about small claims court. Lawyer said don't bother, there was nothing that could be done. Zach ended up having to find a last second roommate on craigslist to pay the rent.