Hey SP - I'm not totally familiar with your situation but judging by your date registered, it sounds like this is fairly new to you (September 2, 2011). So, while I share similar sentiments as you, several posters would say to "get a grip". If you are tired now, what are you going to be feeling if this stretches out 6 months, 12 months, 2 years, etc? The point is that if you are committed to DB then you have to resign yourself to the fact that it will likely take a very long time to turn things around.
So the question is, are you up for the long journey? If so, then you must know that it will not be easy. There will be many good and bad days ahead. What you need to do is GAL to help you get your mind off your troubles. Rediscover yourself! Learn what it is like to be the man you were when you and you W first got married. Focus on these things, do your 180's and if things work out, FANTASTIC! If they don't then you at least gave it your best shot.
Now, if you are not up for the long journey, then your decision is fairly easy. give up and move on. The choice is your to make.
Full disclosure.... I am struggling with the same doubts as you but what I read here and elsewhere and what I feel in my heart of hearts is that staying the course is worth it.
Only you can decide though!
Me51 W53 S17 S14 M22 T25 Bomb-9/11; A-11/11; I move out 11/11
It's easy to find our bottom, it is our top that requires cultivation.
Every rough spot adds to our emotional constitution. -Barney Fife