The Problem of Nihilism

I was a new atheist about 13 through to 17 I was fairly militant about it. The problem with nihilism however is that if everything has no meaning then equally your misery means nothing either right? There's not really any reason to do anything and people can try throw in reasons as to do anything like self-respect but with self-respect if everything's meaningless what is it to respect itself and everything just begins to crumble and you don't need to, he says.