Irene Adler

I believe that the fascination Holmes had with Irene Adler was just a weird obsession with her because no where did it say they were close or had any type of relationship together . That makes me think he was just overly obsessed . I think he fell for how she was and she beat him in his game so that is where the obsession came from . But once the truth came out and she realized who Holmes was he had lost her . I think Holmes attempts to get at her were long lost after she found out about him