I would definitely go to IC and your MD about how you feel about things. While you were dating your wife, were you more fun and looked toward the future?
It is a very important time for you, start to 180 yourself. I don't know, if you are always negative, how about coming home with some scratch off cards, and have fun with the kids with them. (just a suggestion, do not judge me lol)
If she is staying in the house it would be a great time to start dressing better, looking sharp, smell nice. Go to the gym and start working out. And start to gal (get a life) go out with your friends this Friday, just say, hey you gonna be around to watch the kids I have some plans for Friday night, and then be real vague. It is time to start to become a mystery man, someone that any chick would love to be around, you can do it. I did!