It's about this girl named bella. She is in love with this guy called edward. He is a vampire. But bella still likes him and is not afraid. But now they are engaged to get married. Bella is unsure if she is doing the right thing. She is nervous. There is also another guy called jacob. He likes bella. But when he finds out that edward and bella are getting married he is furious. That's why bella is unsure. In the end they get married. Bella really wanted to become a vampire. Edward said they get married. That is one reason why she married him but she loved him very much too.
Well that's I think that the meaning is cos it is from twilight. If I got anything wrong please correct me cos I haven't seen the movie yet it's just me guessing. Enjoy! :)