I am not aware of any girl called Joanne Christie in the Harry Potter novels.
Yes. Harry Potter dated Cho Chang in his fifth year and Ginny Wealsey in his sixth. Harry later went on to marry Ginny in later life.
Ginny Weasley (Ron's younger sister) who Harry Potter eventually married. He also dated Cho Chang in the fifth movie.
Harry Potter and Hermione Granger never dated. Harry has only dated two girls; Cho Chang and Ginny Weasley who later became his wife. Neither Harry or Hermione had romantic feelings for each other and loved each other like brother and sister.
Not sure what you mean by "real life": Both Harry Potter and Ginny Weasly are characters in a fantasy story. They don't exist in real life. In the story, Harry Potter dated Ginny Weasly, and they eventually married.
Cho Chang, his first girlfriend, is one year older than him. She was sixteen when they dated. Ginny Weasley, his second girlfriend and wife, is one year younger than him. She was fifteen when they dated for the first time, Harry Potter then broke up with her to protect her and they got back together when she was sixteen.
Yes, they can, but they don't have to. If you read Harry Potter, Harry dated Ginny, who was Ron's, his best friend, sister, wasn't he? And Hermione dated Ron, who was Ginny's brother. But usually if you are cool enough to be in a relationship- you don't read harry potter so in that case- the person should ask you first and make sure there is no pause between the question and your response.
Hermione Granger dated Viktor Krum for a while. This made things difficult for Ron, since Krum was Ron's Quidditch hero. And in the Half Blood Prince she dated Cormac McLeggen, but just to annoy Ron (Because he's with Lavender Brown)
Since they got married and had children together, it is safe to assume she knew they dated. However it was never known if she knew at the time.
Yes. They dated during Harry Potter and the Half-Blood Prince before separating to protect her from Lord Voldemort. At some point at the series ended, they dated again and later married one another.
Probably Harry Potter, although she dated people before him it's not likely she loved them as she was only a teenager.
No, Bonnie Wright and Daniel Radcliffe have never dated. They are known for their roles as Ginny Weasley and Harry Potter in the "Harry Potter" film series, respectively, but their relationship has always been that of close friends rather than romantic partners. Both have spoken about their friendship in various interviews, emphasizing their camaraderie during the filming.
He dated a set painter, Rosie Coker, for two years, but they recently broke up.