I know the problem, wish I had some good advice for you.
During her last year, my Katz couldn't sleep at night and was desperately trying to get my attention - nothing helped. But this was because she was old and sick and probably felt that there was not much time left for her.

Your cat is still very young and full of energy, it's obvious that he's bored in the middle of the night and is missing somebody to play with. How about getting a second cat? If he'd get a little cat buddy he doesn't have to wake you up in the middle of the night when he wants entertainment...

Kirsten