It was very much realistic, shows the thought process of the modern teen. The movie can in some scenes be very mundane and depressing with a very good story line which makes it stand out.
Every child in their teens had a squabble with their parents sometime after which a period comes when either of you don't speak to each other but still do the respective duties and ultimately gets succumbed by the love that you have ,well, this has been depicted beautifully in this movie