It's only been 3 months....everything SHOULD be grand and rosy at first! That's when we put our best foot forward to impress the other person. He is now showing you who he TRULY is. If you have any doubt about getting out now when it's early and you have little invested, read through the posts here and see what your life will be like a few years down the road.
He's not who you thought you were getting. That's okay. You are now aware, and once you're aware you can't go back. Move on. He is not your problem to fix. I agree with COD, don't wake him up on the couch. That's his choice. If he wakes up with a sore neck or misses the alarm, it's part of the consequences. BTW - expect that when you DO move on he will likely come on full force with the lovey dovey sweet say whatever you want to hear stuff to try and pull you back in. It's called "quacking", don't listen.