it is not that naina does not trust raj anymore. she is more focussed on her mission and she has made it clear that love will be a distraction. she looks up to raj for motivation.
right now she needs to fight back win back her friends and raj which she will definetely do as her character is portrayed as strong and determined.
ritu is not raj's type -that's what i guessed from the serial. raj fell in love with naina b'coz beneath her tough, courageous and loyal exterior which he always admired he saw an innocent, bubbly naive girl who had joined the army to save he beloved brother. ritu is too bold and smart for raj. naina needs guidance and protection b'coz she's a straightforward girl brought up in a secure family
naina does not know much about the dirty politics of bhargav or the academy. only raj can save her. raj's prefers naina's innocence and stubbornness and naivety and courage to ritu's smartness and boldness
i have high hopes for rn jodi
i am not blaming naina b'coz she doesnt have feelings for raj but i am dissapointed abt her behaviour towards raj when she wanted those photos ...she could have found a other way to get those photos rather than hurt her fav teacher who had risked his career for her several times
and the way she behaved on thur's epi abt the letter showed how much she trusts him.........
even i have high hopes for RN jodi but i cant ignore these things also