"But what if it's true?" (This next paragraph is going to sound a little harsh, and I apologize.) “But what if nihilism is true?” is the obvious counter-argument. You kind of make it sound like not being a nihilist requires motivated reasoning to accept, and that what you’re offering only works if you agree not to think about it. It sounds a little like you’re about to engage in apologetics. That said, I get why it isn’t: “Nihilism is true, therefore you should be a nihilist,” is one of those arguments that is so confused and wrongheaded that it’s not going to be easy to argue with somebody who takes it seriously. This is especially true for those who’ve learned to think objectively by abstracting out their own point of view and interests. The problem is that I can (maybe) imagine a universe in which nothing means anything, but I can’t seriously live in this universe with the attitude that nothing means anything.