Take a break from all of this.

You literally live to please your wife and get her back.

It sounds admirable but in reality, you have no life, that's why this is all you can do.

Join a team sport, play on a men's softball or soccer team and get used to "ME" time once or twice a week that doesn't involve thinking about the kids or your wife.

You need to get in the habit of really GAL'ing.
Not just saying you'll get get a life.

Reclaim that individuality, get out of your comfort zone (playing xbox 360 with a headset at home is not GAL), get out with friends for a few drinks once per week, join the guys for a UFC pay per view and eventually some social interaction with some other women.

Get this straight,
your wife is not afraid to lose you,
she can't be afraid to lose you, SHE HAS YOU, SHE CAN HAVE YOU ANY TIME SHE WANTS and she knows this.

Do you know this?

You are afraid to lose your wife.
YOU DON'T HAVE HER, YOU DON'T HAVE HER ANYTIME YOU WANT, you know this.

She can't chase you/pursue you if you're always there,
she doesn't have those feelings for you because you are always pursuing her, she knows this, you say you act differently around her but I'm pretty sure she's extremely intuitive when it comes to you and knows you're just bluffing and putting on a show.