I've singlehandedly ruined my own life and others
Who else's life have you ruined?
I've ruined my wife's life with my infidelity
Infidelity is a terrible act and you shouldn't have ruined your wife's life. Wrecking people's lives will cause them to detest you.
I only did what I thought was right.
I know it's difficult to correct your mistakes now but at least you should try to make amendments. Talk to your wife and apologize for what you did that's the least you could do.