I'm making the same mistakes so don't feel bad. I want my W to know that I know she's having a PA. Unfortunately for my sitch my W has already checked out and I don't think there is anyway to repair what we've done.
The main thing is controlling our anger and insecurities and be great fathers to our kids. I found out this morning that W has moved on to OM2 and has gotten physical with him. I LOST IT!!!!!
Not sure why I lost it, she's free to do whatever she wants. I feel that while we are living together we should maintain some sort of respect for each other. I learned today that I can't control that and she's going to do what she wants when she wants.
It's so hard to put on a smile when W is around but I need to start doing that for my son. Not much advice i'm offering but I wanted to let you know that your not the only one who lets his emotions take over.