Unanswered

I am in love with the character of the girl in the bus! Her looks are so intense. Damn.

What is the director trying to convey here?
I am wondering . . . that Khalujaan is in love, that he is feeling everything around him is romantic, blissful and nice. Even if the girl doesn't look at him lovingly the man in love will feel that the stranger girl is so fond of him. That you are worth a look and possibly a smile.
Why is the man who learns that Khalujaan and the girl exchanging glances, giving him his seat?
Since Khalujaan is old?
Or is he a romantic himself and he understands?

Its 4.00 am.
I have lot of unanswered questions including three essays.
And the song is in loop.