Manik in between utters 'toh rokhlo mujhe' I was confused & hopeful that moment but Nandini was so busy figuring out the truth(which was a lie) in his words that she did not hear this bit!
Manik broke her trust but did she trust him enough? May be she could try to see through his puffy eyes..
The previous night she was all dreamy & didn't notice that he was being very emotional & had cried..(Similar to what Dhruv did when he confessed to Manik)
Neither today.. She denied his claims at first but when he forced her to believe she 'trusts' those words there but her trust on her love was not strong enough! She did not even trust her fireflies!
They literally failed the test of time! they are still too young to understand the seriousness of trusting someone eternally!
So both of them need to learn and both of them need to grow.. Together!