I believe that this guy is Rudra, after having plastic surgery, he cannot face Nih. and his family, they may not believe and do not forget he would want to find out who tried to kill him.
I think he is getting closer to Nih. so that he could convince her of who he is, if he was to say it, would she believe, he needs to convince her, then I think he would have to convince his family and help them. While he is trying to figure out who tried to kill him, if they know he is alive, they may try it again, so he needs to figure out who did it.
He has to convince everyone who he is, remeber this family tends to believe what they see, so if they see this guy they would think he is pretending to be rudra. Also rudra needs to find Parth, if he lets his identity be known, the cops would arrest him, and he has no idea where parth is .
He has a lot of reasons to keep his identity hidden.
What do you think.