Umar is the lively soul in LFs. But makers doesn't show his scenes at all. Otherwise a separate thread would have been made for his one liners.
About relationships, he's so good to everyone even though the opposite person doesn't support him any way. He's very much selfless and good human being. There are no friends for him. I mean it when I say this. Not even KK is his loyal friend. KK may have good things to say but he never supports Umar in open and that shows his loyalty. And about others, none considers Umar as their friend. So let's Chuck it...
If at all someone is good to Umar, I would rightly say it is Pratik. He's the only one who speaks good about him whenever he takes his name...