EVEN MORE REASON you should call him back and tell him you're just too damn worn out to make it sorry so glad you called though thanks for thinking of me. If you phrase it like that, without having to search the files to find the NO word that keeps scurrying off when it sees the phone approach your mouth, it might be easier.

FIERCE HUGS, KOL. YOU CAN DO IT. *lends you her Bitch!Hat and cheers you on from afar* <333