Originally posted by: Go4welkin
Rehaan is currently very gullible due to back stabbing of his mom and her significant role in snatching away love of his life. All he craved is to belong and find love and it is only natural to feel defeated to realize that after years of longing to be loved by his mom, he still remains as her second preference compared to her love for money.
At the moment, he is not completely rational and want to grab any little hope that comes his way and Seher happened to him exactly at that moment and thus the rushed confession. However, I genuinely feel that Rehaan and Sunehri love story needed some more time without interference of her fake parents to make it more relatable but at least Rehaan's rush to confess his feelings due to above mentioned reasons is convincing.