Omg DM1 - do not listen to all this ranting!!!!!!
You're doing ok, I think. Your (plural, joint) relationship was sliding and neither of you were taking action to sort it. You ended up doing something ultimately very reckless. Now it's all come out and you've been given a chance to sort things out.
Your response should be: happy!
You and your wife can make this work. But please please do look into counselling, together.
And of course don't beat yourself up. Many of us do reckless things sometimes as a way of 'coping' with something unbearable. The alcohol is another example of this. The rejection, distance and lack of love was unbearable to you. Now you've learned that actually the way to resolve that is turning to your wife and working it out with her.
As for the OW - now I will get vehement!
No I'm not a 'horrible person'
What I did was horrible
What I did to the other woman is also horrible but she knew I had a wife and children and did a horrible thing too so all I can think about at the moment is my wife
Quite right too.
Let us not forget what the OW did - she knew you were married with children. She took advantage of your marital slump. (Many MNetters will disagree with me but my position is that if you fuck a married man, you are potentially interfering in the lives of his wife and family - and you just shouldn't).
And ... she then inflicted maximum hurt on your wife and you by giving all the details. She took revenge.
So ... really no you should not be worrying in the least about the OW. My goodness no. You have enough people to worry about!! And she has been an absolute bitch so let her sort herself out. NOT your concern, or responsibility.
Feeling you are worthless and pointless because of guilt is understandable, but actually ultimately the most pointless thing to do. The best way to make things right and good again is to get counselling to help you park all this experience and move on. Build up your marriage to be stronger. And happier. There is real enduring love there. You've got it. That's great. And children. Your family.
It feels humiliating and shocking, I know, the realisation that it was you who did this stupid, awful thing. But now you have to leave it and move on. Literally forget about it. It's behind you all.