Hey guys.....i think raj donot want to tell Naina about Navin's girlfriend and he knows about his gf.........but may be he is not sure that is she goodone or badone.........Raj wants Naina to think about herself.
He loves her but not able to tell her because of some guilt (I think) and not able to tell anyone else because of she is his student. He is so confused about what to do thats why he tell that he is complicated person...............Some major thing was happened at the time of Navin's death......and this ritu, raj, bhargav navin's gf are connected with this case in any sense. Raj donot want to tell this whole thing to Naina otherwise she will misunderstand him.......n then hate him. This will create problem for him because he knows Naina's capacity and how much she loves her bro. And second thing he is also aware about whole truth and he want to find it with Naina?...........Navin was his best friend no doubt about it......but with this topic so many truth will out of box thats why he shut his mouth..........whats say guys?