I can sense it that romantic angle between nesam can be possible as we know that neil is in love with her so here two situations can be occur from here.
1. Neil is in love with sam but as per his mom dialouge about let her go. Cvs may show him moving on from sam and they will later term it as infatuation.
2. Sam is so much in love with arjun right now but when she discover about his evil revenge and was two timing her. Then shattered sam will always have neil waiting for her and eventually she realised that she always been in love with him.
Radhika right now is not so smart I dun like her literally nagging on arjun when she knew he manhandles her and all her dialouges seems so dizzy. Currently she is in james bond avtar lol.
I just want to say one thing about samArj is that arjun ignites her soul.