Landlord withholding deposit.
I recently was interested in renting a two bedroom apt. The landlord informed that others were looking to also rent the apt and to quickly make a decision. So without signing a lease or any documents I gave him a deposit to hold the apt for me. Two days later my would be roommate informed me he would no longer be able to rent with me. Without a roommate I was not able to rent apt. When I explained my situation to the landlord he informed me he would not be giving the deposit back until someone else rented the apt. This was nearly a month ago and he will still not return my deposit. Is he allowed to do this?