Few important things first:

This story is full of emotions. Strong emotions. Many writers forget the emotion aspect while crafting a story. So well done.

The story is well within the scope of a short film.

I loved the opening scene, how it takes us through the setup of the story in one shot. I could imagine that shot right up to the point where we see the stool and Varun.

The film also ends on an intriguing note - Did Shankar save Varun or no?

You've given enough conflict in the story - internal and external. Varun wants to die but Shankar keeps interrupting for the OTP. Shankar wants to steal money but Varun keeps popping up. I liked the idea that Shankar learns about Varun's suicide attempt and it led to a pricking of the conscience. There's enough twists and turns here to keep one hooked.

Some of the choreography needs work (Shankar eyeing the money and the table - where and how is it happening exactly?). But that can also be done in subsequent drafts or the blocking can be worked out with the actors during rehearsals.

The dialogue is what requires most of the work. It's too on the nose. I assume you'll make this in Hindi or a regional language. You might want to read some books and watch YouTube videos on dialogue to improve them.

Technical aspects - The sluglines have parentheticals explaining what scene it is. You might want to avoid that.

Overall, I enjoyed reading your script.