If your just corresponding with this woman who's in another state, and its nonphysical, it should be very easy to end it. Just text or email her and tell her your uncomfortable with it. Tell her your happily married. Or tell her your wife found one of her notes to you and insisted you end all communication immediately. If her feelings are hurt, that's tough, she should have known better than to get involved with a married man, and so should have you. She's probably just a lonely person looking for companionship anyway. Next time, give it up before taking it up. I suspect you lead her on just to let her down, and its not nice to play with someones emotions like that. But you both should have known better in the first place.. jmo