Hi old school.
Ugh. This sounds like such a hard thing to go through. This relationship stuff can be SO incredibly hard. No wonder you were/are mentally and physically exhausted. First and formost, take care of yourself. Be kind to yourself and remind yourself you are doing the best you can. Keep taking deep breaths, walk, get out to do something you enjoy. Do you have any friends you can spend some time with? Confide in? Even just to share that things have been stressful, without going into to details. Try to get out and talk with people - to the mall, a car show, a game. I would say take some time for yourself. Time to think and let go a little bit. Then, also, would your wife agree to see a counselor? I think this could really help. It isn't easy, but it is helpful to have a 3rd part there to listen, referee, and offer advice. Sending supportive thoughts your way.