If my memory serves me right, Yash is older than Ratan. He is probably closer to Diya's age than Ratan is.
Why no one (including his stupid and scheming parents), ever thought of getting him married. Is it the relationship thing? Ratan being the uncle (even if he is younger), gets precedence. (It is not unheard of in joint families)
As far as you can see Yash has a job,(that too, government job , which is a big deal in India đđ) He is from a good family and is a good looking man. Why no one ever mentioned his marriage? Even Kaki ma sa who is his grand mother.
(No. I am not necessarily talking about his marriage to Diya, but his marriage in general, it is evident in the social setting they are from, they get married early in life before 21 or so for girls and probably before 25 for guys. Why is he an exception?)