My POV on why Raavi removed her hand, definitely not trolling her.
As much we all want physical proximity between them, which we get plenty when they are fighting or there is agnst or even when there is nok-jhok. But this romance is a new territory for both of them. We all know Raavi is romantic from what she wrote in her diary in the past but she had to bury them all with the way things shaped up between her and Shiva after Sneha Kaand and the diary kaand, because at that point she was struggling to keep her relationship from breaking, tried physical proximity by putting her hand on his shoulder during one of the confrontations in their room, trying to hold his hand during BhabiMa room painting session. But every time she did that she only got pushed away by him,
Though they are at a slightly better place today, she still recognizes that they have a long way to go and realized that Shiva also needs some time just like she does to get to the next step in theirvrelationship. She doesn’t know that Shiva is starting to feel fine with her being around him all the time. He never told her explicitly, neither indicated that he is ready to move on to the next step until today. She still thinks he is hesitating to drop her at college, so he might not like this hand hold as well. She only did it to save both from Dhara’s suspicion and her constant probing. Hence she ended up apologizing for the hand hold which was a spur of the moment act but little did she know the tables would be turned on her and he would refuse to let her go,
We have to give Raavi some more time to get used to this Shiva as she has never seen this side of him at all.