Is Nora acquainted with Dr.Rank?

In Ibsen's A Doll's House, Nora has only two visitors to her home--Mrs. Linde and Dr. Rank. Mrs. Linde is someone from Nora's past who comes to ask for help as she is newly widowed and has no one to turn to. Dr. Rank is Torvald's friend, and he comes to the house frequently to go in the sitting room and talk to Torvald. Sometimes, however, he visits with Nora. Although Dr. Rank is Torvald's friend, Nora feels oddly comfortable telling him things about herself she does not tell her husband. For example, she eats macaroons in front of Dr. Rank and tells him some of her real thoughts. Toward the end of the play, Dr. Rank reveals that he has feelings for Nora. She brushes him off, but the audience understands that this is what draws him to her--attraction.