According to the girls from the LUX forum, CW has not released any official statement about the cancellation of the show, but if the actors themselves are already kinda of saying goodbye ... is kind of hard to stay hopeful!
But we never know. The important thing is still watching the remaining episodes - seeing the audience rise perhaps the CW change their minds. And there are also petitions that fans can sign to try to keep the show on the air. It worked with Roswell, maybe will work with LUX too!
Save Life Unexpected!