I'm sorry about your situation, but I'm glad you found your way to this board. You will find a lot of support here.
Don't be afraid of counseling. Talking about the darkest things will help you and your wife get to the root of your problems. It is never too late to save your marriage, especially when the walk-away spouse says that she is "open to being proved wrong." She WANTS it to work.
The Facebook fling is giving her a "greener grass" feeling and is probably helping her try to envision life beyond your marriage. Your job is to make yourself a man that she can't help but choose over anyone else in the world. Not easy, but it can be done.
Please read Sex-Starved Marriage and No More Mr. Nice Guy ASAP. Keep an open mind, and prepare yourself for a long journey. No matter what happens with your marriage, you have a lot of work to do for yourself to make your life a better one.
