Serena needs to grow up

I really only have one thing I need to say in regards to the last few episodes of Gossip Girl: Isn't Serena much too old to be wishing mommy and daddy would stop fighting and end up back together? At some point kids realize their mom and dad don't belong together, accept that they are divorced and grow up. Yet in the last few episodes we see that Serena is still living in Neverland and holding on to that childish dream. She even goes as far as to sabotage Rufus. I just hope we have seen the last of William for a while so that Rufus and Lily can work on their marriage without any trouble from nosy teenagers.