Tbh, at PBM, Mayur weren't exactly about to get married.
As for Gunjan, she's just been proposed to by Samrat ( a reasonable sign of long term commitment). Samrat and she have been together for a fair amount of time, and you can't really fault her for going all the way. Remember that she didn't quite initiate it- Samrat did. And in circumstances like that, you CAN get carried away. They are still teenagers remember?
To call it pathetic would be demeaning and unjust.
I'm not taking sides here- a simple rational third party view.