Judge don't care who's boning who. If you don't think the marriage can continue, then file for divorce and move on. They're not your kids, so it's just a split of assets.
If you're not a US Citizen, then the marriage and quickie divorce will likely raise some questions about your immigration status.
Come down from DefCon 5, talk to a lawyer, tell him you want a divorce, and to be done with it as quickly as possible and move on to someone else. There's plenty of other women to choose from.
The board is the sum of all of your great posts. Help divorced men be great dads!
Divorce help in a father friendly divorce forum. More tips on how to deal with your divorce at DadsDivorce.com