Do you have any friends you can text, email, or call? Have an old hobby you've been neglecting, like gardening or playing the piano? Have any movies or museum exhibits you've been meaning to see? (I read A LOT and you said that wasn't an option.)
It's really tough at first (mine's an in-house separation - it would be easier if he lived elsewhere), but it DOES get easier in time. They go from thinking "Woo-hoo, I'm free!" to, "Does she even care about me any more?"
Meanwhile you'll go from thinking, "I can't POSSIBLY live without him!" to thinking, "Yeah, I could do this. Wonder if Match.com's any good?"
I think the biggest difference I've noticed is that for 20 months I couldn't watch anyone on TV, the movies, or in real life have a normal, loving relationship without bursting into tears because mine was such a mess. Now, I realize I deserve that again, too - and that WH has a LONG way to go before we get there.
Right now you may want him back however you can get him. By distancing, you realize that if you were single again, you wouldn't date him "as is" because he's being such a jerk. You both need time to sort things out and determine if divorce is the best option. Usually it's not. By "disappearing" from his life for a while, he may come to see it too...
