We can eliminate trust as its evident that he trusted hi two friends, especially Rajveer[letter to his family] immensely. His love for Naina remains!😊😊
However, he saw both his friends giving way to the system's malfunctions an injustice......Bhargav said, that Rajveer gave a statement against Naveen in the court hearing.............so here was Raj............and maybe, some reason for Abhimanyu......some cause of hesitation, after being severely tortured!😭
So the only person he could imagine was his Naina............being immature, and headstrong, she retained all had all the qualities of Naveen, and he knew that! He knew that Naina will.....will.......and will stand up for him...........and will even die.....like him, fighting for the truth......if need be!!!!!👏