M.L.
You know, marriage is not what it's cracked up to be. They sell you on the concept with the romance and all, but the whole thing is a waste of time. If I were you, I'd dump him. I wouldn't care if my husband cheated, because as far as passion goes, he's lacking in that department.
But as far as your situation, I would get rid of him. If he's blaming you for cheating, how about going out and having a good time? Do it for yourself.