I agree with labug. You're probably going to be tempted to try to convince him why he's wrong and should stay with the M. That's what I did the first few months after it happened.
Even after a year, I have to remind myself that "those convinced against their will, are of the same opinion still". If he's going to change his mind, he has to do it himself. No matter how logical or sensible your argument is for staying together, it is going to mean nothing to him right now.
I'd also advise keeping your library books somewhere H can't see them. He might get the wrong idea from the titles such as DR or DB.
Maybe every time you're tempted to start a conversation with him, you can drive to a coffee shop to hang out for an hour or so and just read your books instead. That'll keep you from saying something you might regret later on and keep you out of the house for awhile. And if it makes him wonder where you're going and how you're spending your time without him, so be it.
M36 XH34 M-5 T7 4/11 H confused 5/11 ILYB 6/11 OW discovered 7/11 I move out, OW over 5/12-OW2,done->new EA, but H wont file 9/12 H "best bf ever" to EA/OW3 3/13 H/OW break up H files 4/13 D 6/18/13