I don't know a lot about your sitch, but I would advise against moving out, unless you are just crashing at a friend's for a couple days. Once you live apart things get exponentially harder. And you did mention that not spending time together was a reason for your M problems.
That said, you probably do need to give your H some space to digest what he is feeling. You are both likely to go through some pretty intense emotions in the not so distant future. I can only suggest that any decisions you make not be rushed so your emotions can cool down and your head can be in control.
You haven't really given too many details of how your affairs happened. A little more background info on your sitch would be helpful.
