At balls he danced principally with her.
He was a constant visitor at their house.
He talked to her as people commonly do talk in society--all sorts of nonsense, but nonsense to which he could not help attaching a special meaning in her case.
Although he said nothing to her that he could not have said before everybody, he felt that she was becoming more and more dependent upon him, and the more he felt this, the better he liked it, and the tenderer was his feeling for her.