I feel for you and your situation. I understand how painful it is.
You married him knowing this was a preexisting issue. Why did you do this? Did you think you would change him?
I rarely say this, but I think you should move toward divorce asasp. Do NOT have an affair while you go through the process. Do not take your husband to the cleaners financially, that wouldn't be fair to him or you.
You could resolve the situation by deciding to be mostly celibate, but that is unrealistic.
The lesson, don't marry someone then expect to change them into what you really wanted. It doesn't work.
All the best, -NOPkins-
I will ferret out an affair at any opportunity.
-An affair is the embodiment of entitlement, fueled by resentment and lack of respect. -An infidel will remain unreachable so long as their sense of entitlement exceeds their ability to reason.