I agree with Azzork - you're super super emotional right now and any human being would be. I think the decisions that 'stick' are the ones that are made in the cold light of day.
Can you go on vacation for a while? Stay with friends? I think if that means using some savings, then go do it. This is serious and you deserve to do what you need to do to take the time you need.
And yes - kicking him out from the marital bed until he stops the affair is the right thing to do, in my opinion.
I hate to mention this. I know it might be upsetting for you. But do you think you might need to get an STD test?
