I'm so very sorry, Katie.
But I am proud of you for recognizing the truth, and what needs to be done.
You know it. You know you have to do it.
The thing is, he knows what's right, too. He knows exactly where he's been and what he's been doing. It's not an effing mystery. He knows how he's been manipulating the circumstances to his benefit.
I'm sorry for his sweet girlfriend. But I'm more sorry for you.
Just take care of yourself. I'm so, so, so sorry. You are doing the right thing.