but my take is may be Aham still have the feeling that He is loosing himself somewhere to Gopi...so trying to keep himself as far as possible from Gopi.....
and may be this is his way to keep himself...his mind and heart away from Gopi and her memories....
and after watching the epi....i m sure he was not angry when Koki mentioned that Someone has kept fast for ur long life and ur happiness whom u dont consider ur own......
and also he had his unique abt to cry expression.....when Koki's Word "Vrat Rakha Hai" echoed......
So m thinking he will say...."Gopi break ur fast on ur own..........m not coming......"
or remote Possibility..."Gopi i'll be there in next few hrs"............