I see what you're getting at but I look at it another way.
What is love between a guy and a girl? It's emotional bonding plus attraction. Without that attraction, you're just friends - and that happens for most people in college - you don't fall in love with everyone. You have a whole bunch of friends, but what makes one person special is a certain something you start feeling for them, which is more than friendship. You want to spend more time with them, you want to be alone with that person, and definitely attraction is a part of that feeling.
For Samrat, the emotional closeness has been there for ages, even when he was with Sheena, he always wanted to spend time with Gunjan. But because she was so removed from his own idea of what his grilfriends should be like - he always thought the hottest girls had to be his girlfriends - he never actually realised that he could be attracted to Gunjan in that way, or maybe he never allowed himself to think of her that way - which could be the explanation of his statements that he was not worthy of her. That was why he always insisted that they were only friends. After Sheena made his doubts start, he has been feeling awkward around Gunjan, because he's become conscious of her not just as a friend, but as a girl, and all those hand touches which had become very casual between them, started becoming more awkward.
The two scenes were actually very logically done - he's removed flour from her hair before, but the way he removed the sparkles was very different ... and that led to his fantasizing the kiss ... which has made him realise that she's much more than just a friend, because he's looking at her so differently. SG were always very cute - but they needed that spark to set off the romance, and I feel that's what has happened. It's not just lust - lust happens when you don't care for a person but just have a physical attraction. This is love - the attraction has happened way after the emotional closeness happened.
Sorry for the long post!!!
i agree with u diya, ur very much crct attraction is also an imp factor but somehow i felt that they were showing that attraction is only the imp factor..for samrat....
may b i'm wrong bcoz many of them r seeing it in the other way
may b aftr the kiss , they should have showed him in confusion for some more tym n then remember his dream gal's description n then KJ in BG n then finally realization wouldn't have been this irritating for me