Sometimes space can clarify things. If you're a compatible match, it can survive this. You say that you can't afford to move right now, so where is he planning on living? Both of you living apart is the kind of money that works getting a bigger place. Do the math with him, however if you find resistance - it's not the living situation that is the issue, and he'll either need to come clean, or you'll have to let him go without knowing any more details.

Sorry this is happening to you!