A woman doesn't have to be with a man to be functional or be able to go on with her life. When we think of a couple we automatically think of a heterosexual couple. There is much more couples than just heterosexual ones. Women can live without men.
I think this quote is important for all people, especially for teenage girls. Girls can be so happy and positive, but at times we can be influenced and hurt by a number of things. People need to learn that no one else should change who you are.