Oh there's definitely that part of you that hopes the whole thing blows up and that OW shows her true colors and turns into the wicked witch that she really is. (Oh yeah!), but gosh!!! I was determined to be the better person, stay on the "high road" be unselfish and wish that someone I had loved dearly was happy in their life.
This did not mean that I was not determined to find my own happiness. I eventually learned (after a lot of pain) that I would in time find happiness with or without him. Life is short, and as far as we know we only have this one shot, so I might as well make the most of it....
There is no arriving, ever. It is all a continual becoming.