He might need a rabbit friend. Rabbits need the companionship of another rabbit, and no amount of human interaction can replace this. I only had my bunny for about 2 weeks or so before I brought home her companion (I was waiting for him to be weaned) and it made a huge difference in the behavior of the first bunny. I would also recommend fixing both rabbits regardless of sex--this greatly lessens the chances of reproductive cancers, allows for most males to get along and stops them from spraying and also, obviously keeps you from getting lots and lots if babies if you get a female to go with your boy.

I would also recommend a simple cardboard box as a toy and hiding place. Mine love their box more than any other toy they have. They hide in it and chew it and then I just replace it as necessary. They don't use their chew toys near as much as they used to, because most of their chewing desire is focused on the box.