One of my best friends is 19. I am 18 and I can’t say I’ve never smoked before, because I have with her. She has been smoking for about a year and she smokes about 3 cigarettes a day. I tell her to quit, and she tried it, but said she NEEDED one after "quitting" for 3 days. How do i get her to realize it is bad for her and that she needs to stop?