Travel doesn't always necessarily have to be a bad thing. There is a way to be gone and actually make your marriage stronger. In fact, there are many emotional affairs where the people have never met and only talk from far distances. Next time you have to travel, you can remember ways to keep the connection alive. She likes to IM. Get a webcam on your laptop and chat with her when you are gone. You can tell her how much you miss her and be able to see her and when you are talking just one on one, looking at only one another, it almost forces that physical attraction and emotional connection. Just thoughts for the future......
