Soooo here's the part which made it a bit clear. So basically Laila dosen't smile infront of if but if it's easier for her to cry for him then that's what he'll give her. So fuc**** sadistic no? But I sill love the story.
He loves her, but this mf is so sadistic that he doesn’t even realize it. And since he doesn’t know how to handle or express it, he's going to fu** up everyone's life and our minds.