Naina-Arjun: That small scene was so beautiful when he applies medicine on her hand.. He knows how beautiful person naina is and admires her a lot.. Naina has a big brother who loves and cares for her.. When confronted by naina, Arjun could not lie to her about stealing papers.. She may not have normal mom dad type family but she has strong sibling bonds like any other normal person.. Arjun, preeti and even pooja is okay.. Naina is little bit luckier than sameer who does not have anyone other than nanu.
Friends: Even in friends, naina has strong emotional attachment with swati and Shefali but it doesn't seem like same between sameer and M P.. They look like normal boys hanging out together n having fun. I hope they show some emotional friendship between them in upcoming episodes
Lack this sibling bond and close friendship bond make void in sameer life bigger than naina's.