One of the keys is to not try and understand it. Just accept that he is angry and will blame you for it. That does not mean it is true. That also does not mean you have to be angry back. Do not get pulled into his emotional state. Just validate his emotions.
W:"I can see why that would make you angry" or "I am sorry that made you angry"
Enjoy your friends tonight!
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712