Prateik ultimately chose to save Neha over his friend Simba inspite of Nishant trying hard to convince him to change his mind.
Even while Shamita saved Rajiv, she was confident that Prateik would choose Neha and she kept repeating 'trust me' to Neha and Jay...she knew that whatever said and done, Prateik won't let Neha leave. Even Teja told Karan that given an option P would always choose Neha unless the other option is Nishant. So the whole house knows the under current between the two.
And the way Neha broke down while talking to Rajiv, after she spoke with Prateik shows they indeed have something between them ...and Neha especially is trying hard to stop & control herself from falling in that loop again.
Let's see how strong is her self control and how long does it lasts.