How long ago did you move? Moving to a new place can cause a disruption in litter habits because they want to mark the new place.
I think you need to figure out some sort of pen/cage situation for him, for your sanity and his safety. That will also help with litter training, as sometimes it does help them get “organized” to be confined. As Cinninmon&Ollie suggested, and x-pen or a C&C cage would be great. You can put down a layer of vinyl flooring underneath to protect the floor.
Then you can give him some supervised free-roam time, and as he starts to improve you can give him more and more freedom.
I think in a dorm room it would be safest for him to be confined in a safe pen while you aren’t there anyway. Then you can also improve your bunny proofing to prevent him from damaging the room.
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.