Proposing to sona - he was living in his bubble that his happiness is mom's happinesss... so there was no conflict in his mind. so it is not a big step for him
Lehenga issue -- again it is a family matter.. brother taking side of Sis going against Ishwari's logic..again all this is with in the family .. so i dont think this is a big step.. the moment she asked if he thinks she is wrong.. he backed off.. All these instances, he did something and then backed off as his mom didnt like his approach..
Here it is like, he found some information from third party and he felt his mom's doing is not correct or did something that would hurt him...this is more like questioning initiated by him..he had too much to digest to further question her rights and wrongs. I am sure he will ask all these questions again in future. but first hand confrontation initiated by Dev is a big deal.
When he befriended Sona and fell in love with her, that was a big step for him too. He had no one outside his family until then. But I don't think today was that big a step for him.When he wanted to gift Neha her expensive lehenga for her wedding, he not only questioned his mother's decision but defied her to buy the lehenga his sister wanted.Even though his mother forbade him to offer Ranbir any monetary thing to protect his pride, he again went against her wishes.So, should I assume in his mind, Sona is an afterthought that he can't even defend her honour?Where is the so called love now?If someone else had bad mouthed Sona, won't he beat him up?Then when his mother did, he could not even admit that it was him to who crossed the boundaries?