how will a native speaker answer what's up?how are you?except fine,thank you,and you? how will a native speaker answer what's up?how are you?except fine,thank you,and you?

on my own Recently I watched the movie Les Misérables again and I am been touched by the dialogue and music deeply.Touching me the most is the scene that Eponine singing the song /on my own/ in the rain.She likes Marius very much and willing to ask the imformations about Cosette.But she feel heartache when seeing them fall in love with each other deeply.In the lyrics,she imagine walking with Marius although she konws it clearly that he likes Cosette only.I can deeply feel her love、her helpless、her sadness and her pain.She gives her life to protect Marius.I understand her feelings very much because I have been love a person once.It's really hurt and unforgettable and unknown.