IF the scenario had been, he confirms with Radhika abt Mishti. Goes to confront Mauli but sees Ishaan n Mauli n Mishti having fun time. He walks away thinking he doesn't wanna disturb that happiness. He owes it to Mauli. He would be there for Mishti as Kunal uncle.
But no... more bashing coming up after actual confrontation scene. Like seriously again my blood boils at the audacity of that man.