IMO ever since Jhanvi came back after he had gone to her house drunk, he has been thinking, unsettled about what their relationship could possibly mean.
Babasa voiced it clearly to him and he thought about it further. He denied it to babasa, but internally he was very well aware of the possibility and started seeing things in that light only. Hence the way he was looking at Jhanvi when she bandaged him, and his reaction to Babasa when he saw that Babasa had seen them. Aditya's awkward silence wasn't a denial or telling Babasa stop with your imagination. It was more of a 'I know what you are thinking, but I don't want to talk about this.'
With this in his mind, it's why he was so restless and bothered at the fact that someone else may be in the picture. There is no surprise or wondering from him on why he's bothered. He is curious and he knows it. It's like, when the first stages of possible romantic interest, possibility came, suddenly oops, there may be another guy in the picture.
His wish at the shed clearly wasn't really about tea, but something which was there but he couldn't voice it, address it or bring up. 1) because it's not completely settled for him yet regarding Jhanvi and 2) because she's giving hints of another guy in the picture
It's becomes completely clear to him with his dream sequence (and it had to be his dream sequence, I was waiting for it to be his dream sequence that if it were shown to be Jhanvi's I would have been like' W*F), and he's not really that surprised after he's brought out of his dream. The question of his feelings becomes settled for him after this. And so, he continues to look at her and admire her, accepting it, even if not sure about what Jhanvi feels on her end.
He sees that Jhanvi has remembered his birthday. Now the question is if the last part is a fake out by the makers to us, or if it was real. It very well may be real, but even if it is, he may backtrack, especially due to not knowing about Jhanvi.
Let's see what happens tomorrow. And that gift was obviously for Aditya, so will Jhanvi get the chance to give it to him? And if so, he should obviously realize that there is no guy. Plus the birthday party the family have planned would be the perfect excuse for her secretive calls and lies to him about the calls.
Jhanvi has perfect excuse to explain away her lies without admitting to him that it was all her and Babasa's ruse.😆