I'm sorry "Depressed" but i doubt you'll hear from him again. I hate to say it, but it looks like you were just a "port" in a storm.
And he DID purposely deposit that money in his account. How could he have ACCIDENTLY deposited someone else's money into HIS account? Why not someone else's account by accident? NO, it just "happened" to be HIS account. This was NO accident, sweetie. This guy is a slime ball, in my mind, and you CAN do much better! With him, all you would have is heartaches.
I wish you the very best -- just move on and try to make better choices in men from now on. God bless and please take care. Hugs, Lee