rate of success for ADHD extramarital affairs...not good I hope!

Hi everyone.  I was recently dumped, for lack of a better word, by my ADHD partner of 9 years.  He denied there being another woman involved, but I am becoming more and more suspicious and paranoid that there is. 

So I guess the spiteful, spurned side of me wants to hope that his future relationships will fail too...that he won't find the happiness that was denied to me.

What is your experience with this?  Did your ADHD spouse have a successful relationship with his mistress or future partners?