I don't think he will express anything right now.. he would share all his fears and worries with nakku but not his love... the first promise he has to keep now is to take nakku safetly to her mother.. in PN aai saheb may insist on dutta to accept nakku as his wife.. now dutta may agree but still may not express what he is truly feeling for nakku..
but the question is what should nakku do then? should she agree for this? i feel she would not because she does not know what dutta is feeling for her.. so she would go on the same decision as before.. not to be with dutta when there is no love..
as he himself has expressed that he is now scared to face the outside world, i think dutta will take some more time to come out with his feelings.. because he needs time now to fight out his own inner fears and whatever little confusions he may have, so that his love will not have any barriers..from within..